Compare phones
| Global Score | |
| 85.5 | 78 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11, 10 | -- |
| 2019-12-27 | 2018-07-27 |
| 6.24 x 2.90 x 0.31 inches | 6.25 x 2.97 x 0.29 inches |
| 6.07 ounces | 5.93 ounces |
| Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white | Black, Blue, Gold, Pink and Red |
| Plastic and Plastic | Aluminum |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 282.00 | -- |
| Display / Screen | |
| 6.5 inches | 6 inches |
| 2400 x 1080 pixels | 2160 x 1080 pixels |
| Super AMOLED | IPS LCD |
| 405 pixels per inch | 402 pixels per inch |
| No touch screen | No touch screen |
| 8.1 | 8.1 |
| Performance | |
| Samsung Exynos 9611 chipset | Qualcomm Snapdragon 660 SDM660 chipset |
| ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Kryo 260, 64-bit, 14 nm (Octa-Core 2200 MHz) processor |
| 4 GB RAM | 6 GB RAM |
| Mali-G72 MP3 GPU | Adreno 512 GPU |
| 9.27 | 9.27 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 14.14 | 10.1 |
| Camera | |
| 48.00 MP + 32.00 MP | 12.00 MP + 20.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | 0.34 inches (1/2.9") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (240 fps) (HD) slow motion video | 1280 x 720 (120 fps) (HD) slow motion video |
| 11.55 | 9.79 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.3 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 3010mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 4.96 |
| 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
Galaxy A51 is a bit better than Xiaomi Mi A2, getting a general score of 85.5 against 78. Galaxy A51's design is newer than Xiaomi Mi A2's, although it is just a bit heavier and just a little thicker. Xiaomi Mi A2 features a screen that is very similar to the Galaxy A51 one, although the Xiaomi Mi A2 has a just a bit inferior amount of pixels per display inch, a bit worse resolution of 1080 x 2160px and a quite smaller display.
Samsung Galaxy A51 has a superior storage capacity for applications, games, photos and videos than Xiaomi Mi A2, and although they both have exactly the same 128 GB internal memory capacity, the Samsung Galaxy A51 also has a SD extension slot that allows up to 512 GB. The Xiaomi Mi A2's processor is very similar to the Galaxy A51 one, and although the Xiaomi Mi A2 has 2 GB more RAM, they both have 8 cores.
Samsung Galaxy A51 counts with a much better camera than Xiaomi Mi A2, because although it has a smaller camera aperture which is worse for low light photos and videos, and they both have the same 30 frames per second video frame rate and the same 3840x2160 video quality, the Samsung Galaxy A51 also counts with a way more MP camera in the back and a way larger sensor which gives a much higher photo and video quality.
Samsung Galaxy A51 has greater battery lifetime than Xiaomi Mi A2, because it has 4000mAh of battery capacity.
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