Colors and appearance of smartphones
| Galaxy M31 | Galaxy A51 |
| Colors | |
The design of the phones is of a high standard. Galaxy M31 is available in the following colors: black, blue and red. Galaxy A51 has 3 colors: black, red and white. Both phones are available in the same number of colors.
Design
| Galaxy A51 | Galaxy M51 |
| Colors | |
Both smartphones look harmonious; designers eat their bread for a reason. Galaxy A51 has 3 colors: black, red and white. Galaxy M51 is available in black and white colors. Based on the number of color options presented, we put the Galaxy A51 phone.
Phone size
| Galaxy M31 | Galaxy A51 | |
| Screen diagonal | 6.4 inches | 6.5 inches |
| Length | 15.92 cm. | 15.85 cm. |
| Width | 7.51 cm. | 7.36 cm. |
| Thickness | 0.89 cm. | 0.79 cm. |
| Weight | 191 grams | 172 grams |
For reference: there are 2.54 cm in one inch.
The large screen diagonal allows you to view photos and videos with greater comfort, and the small phone easily fits into your pocket. But let's return to the smartphones in question - they have different display sizes: the Galaxy M31 has a slightly smaller one. Let's also pay attention to the weight and thickness of the models: the Galaxy A51 is thinner and lighter than its opponent.
Phone comparison - select the smartphones you want to compare
Comparison - Samsung Galaxy M31 vs Samsung Galaxy A51
Samsung Galaxy M31 is a 2022 smartphone with a weight of 191 g and dimensions of 159.2 x 75.1 x 8.9 mm.
It has a 6.4 inch screen, 64 megapixel camera and 64GB 6GB RAM, 128GB 6GB RAM. Its Octa-core processor (4×2.3 GHz Cortex-A73 & 4×1.7 GHz Cortex-A53) Samsung Galaxy A51 is a 2022 smartphone with a weight of 172 g and dimensions of 158.5 x 73.6 x 7.9 mm. It has a 6.5 inch screen, 48 megapixel camera and 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM. Its processor is Octa-core (4×2.3 GHz Cortex-A73 & 4×1.7 GHz Cortex-A53)
For a detailed comparison of all features, see the table below.
or
| General characteristics | |||
| Make and model | Samsung Galaxy M31 | Samsung Galaxy A51 | |
| Rating | (+1) | (+0) | |
| release date | 2020, February 25 | 2019, December | |
| Dimensions (HxWxD) | 159.2 X 75.1 X 8.9 mm | 158.5 X 73.6 X 7.9 mm | |
| Weight | 191 | 172 | |
| Frame | Glass front (Gorilla Glass 3), plastic back, plastic frame | Glass front (Gorilla Glass 3), plastic back, plastic frame | |
| Colors | Ocean Blue, Space Black, Red | Prism Crush Black, White, Blue, Pink | |
| Battery | 6000 mAh, Unchangeable, Li-Po | 4000 mAh, Unchangeable, Li-Po | |
| Battery life | Talk time - Up to 32 hours (3G) Audio playback - Up to 87 hours | ||
| Approximate price | 200 EUR | $280 | |
| Display | |||
| Technologies | Super AMOLED | Super AMOLED | |
| Touch screen | yes, capacitive | yes, capacitive | |
| Color depth | 16M | 16M | |
| Size (Diagonal) | 6.4″ (inches) | 6.5″ (inches) | |
| Screen area | 100.5 cm2 | 102.0 cm2 | |
| Ratio (height:width) | 19.5:9 | 20:9 | |
| Ratio (screen:body) | 84.1% | 87.4% | |
| Resolution (pixels) | 1080 x 2340 px | 1080 x 2400 px | |
| DPI | 403 PPI | 405 PPI | |
| Screen protection | Corning Gorilla Glass 3 | Corning Gorilla Glass 3 | |
| Cameras and video | |||
| Rear camera, main | 64 MP, Triple camera | 48 MP, Quad camera | |
| Characteristics | -64 MP, f/1.8, 26mm (wide), 1/1.72″, 0.8µm, PDAF -8 MP, f/2.2, 12mm (ultra-wide), 1/4.0″, 1.12µm -5 MP, f/2.4, 25mm (macro camera), 1/5.0″, 1.12µm -5 MP, f/2.2, (for depth measurement) | -48 MP, f/2.0, 26mm (wide), 1/2.0″, 0.8µm, PDAF -12 MP, f/2.2, 12mm (ultra-wide) -5 MP, f/2.4, 25mm (macro camera), 1/ 5.0″, 1.12µm -5 MP, f/2.2, 1/5.0″, 1.12µm, for depth measurement | |
| Functions | LED flash, panorama, HDR | LED flash, panorama, HDR | |
| Video recording | [email protected] , [email protected] , gyro-EIS | [email protected] , [email protected] /120fps; gyro-EIS | |
| DxOMark main result | 87 | ||
| DxOMark photo result | 90 | ||
| DxOMark video result | 86 | ||
| Front camera, selfie | 32 MP, Single camera | 32 MP, One camera | |
| Characteristic | -32 MP, f/2.0, 26mm (wide angle), 1/2.8", 0.8µm | -32 MP, f/2.2, 26mm (wide angle), 1/2.8″, 0.8µm | |
| Functions | HDR | HDR | |
| Characteristic | [email protected] , [email protected] | [email protected] | |
| Productivity | |||
| Operating system (OS) | Android 10.0; OneUI 2.0 | Android 10.0; OneUI 2 | |
| Chipset | - Exynos 9611 (10nm) | - Exynos 9611 (10nm) | |
| Central Processing Unit (CPU) | — 8 core (4×2.3 GHz Cortex-A73 + 4×1.7 GHz Cortex-A53) | — 8 core (4×2.3 GHz Cortex-A73 + 4×1.7 GHz Cortex-A53) | |
| Graphics Processing Unit (GPU) | — Mali-G72 MP3 | — Mali-G72 MP3 | |
| External memory card | microSDXC (dedicated slot) | microSD, up to 1 TB (dedicated slot) | |
| Inner memory | 64GB 6GB RAM, 128GB 6GB RAM | 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM | |
| Antutu 8 result | 194554 | 192677 | |
| Antutu 7 result | 155326 | ||
| GeekBench 5 Single Core result | 323 | 322 | |
| GeekBench 5 Multi-Core result | 1211 | 1212 | |
| Communication and communication | |||
| SIM card | Dual SIM (Nano-SIM, dual standby) | One SIM card (Nano-SIM)Dual SIM cards (Nano-SIM, dual standby) | |
| Net | GSM/HSPA/LTE | GSM/HSPA/LTE | |
| Show all network frequencies: | |||
| Frequencies | -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE (unspecified) | -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) -3G - HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 -4G — LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 20(800), 26(850), 28(700), 38(2600), 40(2300), 41(2500), 66(1700/2100) | |
| Internet speed | HSPA, LTE-A | HSPA, LTE-A | |
| GPRS | Yes | Yes | |
| Edge | Yes | Yes | |
| WiFi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS | Yes, with A-GPS, GLONASS, GALILEO, BDS | |
| NFC | Yes (market/region dependent) | Yes | |
| USB | 2.0, Type-C 1.0 reversible connector | 2.0, Type-C 1.0 reversible connector, USB On-The-Go | |
| Bluetooth | 5.0, A2DP, LE | 5.0, A2DP, LE | |
| Harmful radiation | SAR - 0.52 W/kg (head) 0.69 W/kg (body) SAR EU - 0.52 W/kg (head) 0.69 W/kg (body) | SAR - 0.80 W/kg (head) 0.67 W/kg (body) SAR EU - 0.37 W/kg (head) 1.59 W/kg (body) | |
| Music and audio | |||
| Radio | FM radio, RDS, recording | FM radio | |
| Headphone jack | Yes | Yes | |
| Other | — Active noise reduction with a special microphone | ||
| Other Additions | |||
| Sensors | — Fingerprint scanner (rear-mounted), accelerometer, gyro, proximity sensor, compass | — Fingerprint scanner (on-display, optical), accelerometer, gyroscope, proximity sensor, compass | |
| Other Addons | — Fast battery charging 15W | — ANT+ — Fast battery charging 15W | |
| Versions | — Versions: SM-M315F/DS | — Versions: SM-A515F/DSN (Global); SM-A515F/DS (LATAM); SM-A515F/DST (Brazil); SM-A515F/DSM (Russia); SM-A515F/N (Australia) | |
Comparison video - not found
Samsung Galaxy M31 vs Samsung Galaxy A51
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Display
Let's evaluate our smartphones based on their main screen parameters.
| Galaxy M31 | Galaxy A51 |
| Display name | |
| Super AMOLED | Super AMOLED |
| Display Description | |
| 16 million colors | 16 million colors |
| Screen resolution, pixels | |
| 1080×2340 | 1080×2400 |
| Pixels per inch | |
| 411 | 405 |
Yes, we must state a draw between the Galaxy M31 and Galaxy A51 in terms of the specified characteristics.
Screen
Let's compare smartphones in terms of quality and main screen characteristics.
| Galaxy A51 | Galaxy M51 |
| Display name | |
| Super AMOLED | color Super AMOLED Plus, 16.78 million colors, touch |
| Display Description | |
| 16 million colors | multi-touch, capacitive |
| Screen resolution, pixels | |
| 1080×2400 | 1080×2400 |
| Pixels per inch | |
| 405 | 393 |
Who will we give preference to? The Galaxy A51 scored , while the Galaxy M51 was inferior only in one of the parameters under consideration.
Processor, memory and battery
Now we present data characterizing the differences in the performance of the compared smartphones.
| Galaxy M31 | Galaxy A51 |
| CPU frequency | |
| 2.3 GHz | 2.3 GHz |
| Built-in memory | |
|
|
| Memory card slot | |
| MicroSD (up to 512 GB) | MicroSD (up to 512 GB) |
| RAM | |
| GB | GB |
| Battery capacity | |
| 6000 mAh | 4000 mAh |
| Talk time | |
| up to 48 hours | up to 32 hours |
| When listening to audio | |
| up to 119 hours | — |
| On the Internet | |
| until 21 o'clock | until 16 o'clock |
According to the stated characteristics (battery capacity, talk time and Internet browsing time), the Galaxy M31 wins in this comparison.
Batteries
This is one of the key differences. The Samsung A31 has a 5000 mAh battery, the A51 has a 4000 mAh battery. The boxes come with 15W chargers.
Let's look at the test results:
Samsung Galaxy A51:
- Continuous calls (screen off): 21:51 h
- Web surfing via Wi-Fi: 13:21 h
- Video playback (any wireless connection disabled): 14:22 h
- Charging speed: 35% in 30 minutes, full cycle – 2 hours 14 minutes
Samsung Galaxy A31:
- Continuous calls (screen off): 32:56 h
- Web surfing via Wi-Fi: 16:54 h
- Video playback (any wireless connection disabled): 20:01 h
- Charging speed: 33% in 30 minutes, full cycle – 2 hours 48 minutes
Samsung A31 wins by a huge margin. This is one of the most autonomous “mid-rangers” on the market, and if autonomy is a priority, then the Samsung A31 is preferable of the two phones. But to give the A51 its due, it also generally lasts well on a single charge.
Camera
Is the quality of your photographs fundamentally important to you? In the table below you can compare these models according to this parameter.
| Galaxy M31 | Galaxy A51 |
| Main camera | |
| 4 camera system: 64MP, 8MP, 5MP, 5MP | 4 camera system: 48MP, 12MP, 5MP, 5MP |
| Matrix resolution | |
| 64 MP | 48 MP |
| Digital zoom | |
| 8x | 8x |
| Front camera matrix resolution | |
| 32 MP | 32 MP |
Do you like to print photos or view them on the big screen? Galaxy M31 will help with this.
Let's sum it up
It's time to take stock. As for the main parameters, the Galaxy A51 model received 5 likes, while the Galaxy M51 received 3. However, it is worth considering that we did not compare the prices of the devices. It's time to reveal the winner. Let's look at the advantages of each model:
| Galaxy A51 | Galaxy M51 |
|
|
additional characteristics
If you find it difficult to decide on a favorite between these two models, then be sure to check out the additional options that will help you make a choice.
| Galaxy M31 | Galaxy A51 |
| SIM card | |
| Dual-SIM: Nano-SIM (4FF) | Dual-SIM: Nano-SIM (4FF) |
| Image stabilization | |
| — | — |
| Video recording, frame rate | |
| UHD 4K (3840 x 2160) at 30fps | UHD 4K (3840 x 2160) at 30fps |
| Water protection | |
| — | — |
| NFC module | |
| There is | There is |
| Geolocation | |
| GPS, GLONASS, Beidou, Galileo | GPS, GLONASS, Beidou, Galileo |
| Authentication | |
| fingerprint reading | fingerprint reading |
| Headphone jack | |
| 3.5mm Stereo | 3.5mm Stereo |
We have made all the main comparisons. We hope you now have enough information to make your choice.
Samsung Galaxy A51 and Samsung Galaxy M51: Which one to choose?
It seems that even though the two phones look similar in terms of appearance, each mobile phone has a lot of advantages. For example, the Samsung Galaxy M51 is superior in battery capacity and fast charging, but the Galaxy A51 boasts an in-display fingerprint.
In terms of photography, the Galaxy M51's specifications are indeed better with a larger sensor size so they can produce better photos.
As for the cost, the Samsung Galaxy A51 is in a more advantageous position for the wallet of many buyers, having a difference of almost 10 thousand rubles less compared to the M51. Whatever the choice, Samsung always delivers quality phones, especially in the mid-range segment.
Results
In our review, the Galaxy M31 got 5 likes, while the Galaxy A51 got 4. Should you make a decision yet? Take your time, there are other parameters that can be viewed on the manufacturer’s websites. Let's summarize the previous conclusions in a single table:
| Galaxy M31 | Galaxy A51 |
|
|
Difference between Samsung Galaxy A51 and Samsung Galaxy M51
Screen size and resolution
Since both are mobile phones from the manufacturer Samsung, it is only natural that the presented screens received Super AMOLED. Specifically, the Galaxy A51 has a Super AMOLED panel on the front, while the Galaxy M51 has a Super AMOLED Plus panel.
The panels may be the same, but the screen size they represent is different. If you prefer a smaller screen, the Samsung Galaxy A51 measures 6.5 inches with Full HD+ resolution.
Meanwhile, the Samsung Galaxy M51 has a larger screen - 6.7 inches, and the resolution is also Full HD +. The difference lies in the pixel density, where the Galaxy A51 has 405 ppi, which beats the Galaxy M51 with 393 ppi.
Processors and performance Galaxy A51 vs M51
- Exynos 9611 vs Snapdragon 730G
Let's compare processor performance. Galaxy M51 has better performance because it is powered by Snapdragon 730G with 8nm manufacturing process and supports Adreno 618 GPU.
As for the Samsung Galaxy A51, the chip presented here is Exynos 9611, manufactured using 10 nm technology. Compared to the Snapdragon 730G, the Exynos 9611 processor on the A51 smartphone is unable to compete with the M51, scoring only 184,823 points on AnTuTu. The Snapdragon 730G has a higher score - approximately 279,461 points.
Camera Galaxy A51 vs M51
Both the Samsung Galaxy A51 and M51 come with a quad-camera configuration that can deliver high-quality photos but has a slight difference in the resolution of the main camera.
The Galaxy A51 has a 48MP f/2.0 primary lens with a ½.0-inch sensor size, which is no better than the Galaxy M51 with a 64MP f/1.8 lens and a 1/1.73-inch sensor.
Coming to the other three lenses, these two phones remain the same, namely a 12MP ultra-wide-angle camera with 123-degree FOV and two other 5MP cameras with macro and depth sensor capabilities. In conclusion, the Galaxy M51 truly outperforms the A51's camera, larger MP size, sensor and aperture.
Fingerprint sensor position
Even though both phones feature a Super AMOLED panel, the Samsung Galaxy M51 does not have an in-display fingerprint sensor like the Galaxy A51. Although the presence of this fingerprint on the display can only be present on OLED screens and the M51 does not take the maximum from this screen.
Read more: Galaxy M51: Review
Read more: Samsung Galaxy A51 128gb review
Read more: Samsung Galaxy M31 review
The Samsung Galaxy M51 has a sensor on the side, combined with the power button, and for some buyers this location is even more advantageous. As a result, the back of both smartphones looks clean without a fingerprint sensor. Both of these phones are fast responsive.
Battery capacity
If you are looking for a phone with great battery life, the Samsung Galaxy M51 is the perfect choice. The reason is that the Galaxy M series is really famous for its huge batteries. This is also true for the Galaxy M51, which has a 7,000 mAh battery.
As for the Samsung Galaxy A51, it offers only a 4000 mAh battery. The difference is very impressive.
When using the smartphone while watching videos, games and social media non-stop, the Galaxy M51 can last for 11 hours and 9 minutes.
Samsung Galaxy M31s, like its predecessor, lasted only 10 hours 11 minutes with a capacity of 6000 mAh. This means that the Samsung Galaxy A51 with a 5000mAh battery is guaranteed to have a battery life lower than both phones.
Fast charging 15 W vs 25 W
Samsung Galaxy M51 not only offers a large battery capacity but also excellent 25W fast charging. Of course, this ability is superior to the Galaxy A51, which only uses 15W of power when charging the battery.
Samsung says the Galaxy M51 can be charged from zero to 100% in 115 minutes or 1 hour 55 minutes. Meanwhile, the Galaxy A51 fully charges in 2 hours. Considering the much smaller capacity of the A51, this fast charging seems insufficient.
Smartphone models similar to Galaxy M31
How similar is the Galaxy M31 smartphone to other Samsung models? We compared the main parameters and calculated them.
| Model | Similarity | Prices |
| Galaxy M51 | 88.7% | from 28460 rub. |
| Galaxy M31s | 85.1% | from 21638 rub. |
| Galaxy A12 | 83.2% | from 10188 rub. |
| Galaxy M21 | 82.2% | from 13668 rub. |
| Galaxy A71 | 81.4% | from 22728 rub. |
Phone models similar to Galaxy A51
Let's determine which other Samsung phones are similar to the Galaxy A51, as well as the degree to which their characteristics are similar.
| Model | Similarity | Prices |
| Galaxy A71 | 93.4% | from 22728 rub. |
| Galaxy A50 | 91.9% | from 15490 rub. |
| Galaxy A80 | 89.9% | from 32990 rub. |
| Galaxy A41 | 89.2% | from 13890 rub. |
| Galaxy A31 | 87.5% | from 12789 rub. |
*All data in the tables is for reference. Please check with sellers for prices and specifications before purchasing.
Performance: Exynos 9611 vs MediaTek Helio P65
Both smartphones received mid-range processors - the 10nm Exynos 9611 on the Samsung A51 and the 12nm MediaTek Helio P65 on the A31. To understand which one is more powerful, I suggest taking a look at the test results.
GeekBench 5.1 (single-core):
- Samsung Galaxy A31 – 352
- Samsung Galaxy A51 – 347
GeekBench 5.1 (multi-core):
- Samsung Galaxy A51 – 1294
- Samsung Galaxy A31 – 1216
Antutu 8:
- Samsung Galaxy A51 – 175363
- Samsung Galaxy A31 – 151815
Graphics test GFX 3.0 Manhattan (1080p offscreen):
- Samsung Galaxy A31 – 18
- Samsung Galaxy A51 – 16
Graphics test GFX 3.1 Car scene (onscreen):
- Samsung Galaxy A31 – 7
- Samsung Galaxy A51 – 5.6
The chips are almost equal, in some places Exynos wins, in others MediaTek wins, but in the two graphics benchmarks it is the Samsung A31 and its Helio P65 with the Mali-G52 MC2 graphics processor that wins.
