Compare phones
| Global Score | |
| 78 | 85.5 |
| Basic Information | |
| Xiaomi | Samsung |
| -- | Android 11, 10 |
| 2018-07-27 | 2019-12-27 |
| 6.25 x 2.97 x 0.29 inches | 6.24 x 2.90 x 0.31 inches |
| 5.93 ounces | 6.07 ounces |
| Black, Blue, Gold, Pink and Red | Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white |
| Aluminum | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 282.00 |
| Display / Screen | |
| 6 inches | 6.5 inches |
| 2160 x 1080 pixels | 2400 x 1080 pixels |
| IPS LCD | Super AMOLED |
| 402 pixels per inch | 405 pixels per inch |
| No touch screen | No touch screen |
| 8.1 | 8.1 |
| Performance | |
| Qualcomm Snapdragon 660 SDM660 chipset | Samsung Exynos 9611 chipset |
| Kryo 260, 64-bit, 14 nm (Octa-Core 2200 MHz) processor | ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 6 GB RAM | 4 GB RAM |
| Adreno 512 GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.27 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 10.1 | 14.14 |
| Camera | |
| 12.00 MP + 20.00 MP | 48.00 MP + 32.00 MP |
| f/1.80 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| 0.34 inches (1/2.9") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (120 fps) (HD) slow motion video | 1280 x 720 (240 fps) (HD) slow motion video |
| 9.79 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.3 | 6.7 |
| Battery Life | |
| 3010mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 4.96 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Samsung Galaxy A51 has a global score of 85.5, which is just a bit better than the Xiaomi Mi A2's overall score of 78. Even though Samsung Galaxy A51 is newer than the Xiaomi Mi A2, it is just a little thicker and a little bit heavier. The Samsung Galaxy A51's processing unit is just as good as the Xiaomi Mi A2 one, and although the Samsung Galaxy A51 has a smaller amount of RAM, they both have 8 processing cores.
The Samsung Galaxy A51 and Xiaomi Mi A2 both count with quite similar screens, although the Samsung Galaxy A51 also has a little bit better pixels density, a slightly better resolution of 1080 x 2400 and a bit bigger screen. The Samsung Galaxy A51 captures better pictures and videos than Xiaomi Mi A2, because although it has a smaller diafragm aperture which is worse for low-light photos, and they both have the same video definition and the same 30 frames per second video frame rates, the Samsung Galaxy A51 also counts with a way bigger camera sensor capturing way better quality photos and videos and a lot more mega-pixels camera in the back.
Samsung Galaxy A51 counts with a much better storage for applications, games, photos and videos than Xiaomi Mi A2, and although they both have equal 128 GB internal memory, the Samsung Galaxy A51 also has a SD card slot that holds up to 512 GB. The Galaxy A51 has longer battery duration than Xiaomi Mi A2, because it has a 33% larger battery capacity.
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