Compare phones
| Global Score | |
| 85.5 | 79.2 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11, 10 | Android 11, 10, 9.0 Pie |
| 2019-12-27 | 2019-07-24 |
| 6.24 x 2.90 x 0.31 inches | 6.04 x 2.83 x 0.33 inches |
| 6.07 ounces | 6.13 ounces |
| Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white | Blue, Gray and White |
| Plastic and Plastic | Glass (Corning Gorilla Glass 5) and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 282.00 | -- |
| Display / Screen | |
| 6.5 inches | 6.1 inches |
| 2400 x 1080 pixels | 1560 x 720 pixels |
| Super AMOLED | Super AMOLED |
| 405 pixels per inch | 282 pixels per inch |
| No touch screen | No touch screen |
| 8.1 | 7.3 |
| Performance | |
| Samsung Exynos 9611 chipset | Qualcomm Snapdragon 665 chipset |
| ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Kryo 260, 64-bit, 11 nm (Octa-Core 2000 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Mali-G72 MP3 GPU | Adreno 610 GPU |
| 9.27 | 9.09 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 256 GB) external memory slot |
| 14.14 | 13.18 |
| Camera | |
| 48.00 MP + 32.00 MP | 48.00 MP + 32.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | 0.43 inches (1/2.3") 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 (240 fps) (HD) slow motion video |
| 11.55 | 11.44 |
| 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+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 4030mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 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 Galaxy A51 has a global score of 85.5, which is just a bit better than Xiaomi Mi A3's overall score of 79.2. These phones come with the same Android 11 OS, so both should give identical OS features. Galaxy A51 is a a little thinner and just a little lighter phone than Xiaomi Mi A3, although they were only released 5 months apart.
The Samsung Galaxy A51 features just a little better hardware performance than Xiaomi Mi A3. Both of them have a Octa-Core processor and 4 GB of RAM memory. The Galaxy A51 has a sharper display than Xiaomi Mi A3, because it has a quite larger display, a way better 1080 x 2400 pixels resolution and a greater amount of pixels per display inch.
The Galaxy A51 has a bit bigger storage capacity to install games and applications than Xiaomi Mi A3, and although they both have exactly the same 128 GB internal memory, the Galaxy A51 also has a slot for external memory cards that allows up to 512 GB. Samsung Galaxy A51 and Xiaomi Mi A3 have quite similar batteries performance, although the Xiaomi Mi A3 also has 4030mAh of battery capacity.
Galaxy A51 counts with a slightly better camera than Xiaomi Mi A3, because although it has a tinier diafragm aperture which is not good for capturing photos and/or video in poorly lited situations, and they both have a same resolution camera, the same 3840x2160 video definition and the same 30 frames per second video frame rates, the Galaxy A51 also counts with a bigger camera sensor.
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