Compare phones
| Global Score | |
| 91.8 | 79.2 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 11, 10, 9.0 Pie |
| 2021-01-29 | 2019-07-24 |
| 5.97 x 2.80 x 0.31 inches | 6.04 x 2.83 x 0.33 inches |
| 6.03 ounces | 6.13 ounces |
| Gray, Phantom pink, Violet and White | Blue, Gray and White |
| Aluminum and Plastic | Glass (Corning Gorilla Glass 5) and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 722.00 | -- |
| Display / Screen | |
| 6.2 inches | 6.1 inches |
| 2400 x 1080 pixels | 1560 x 720 pixels |
| Dynamic AMOLED | Super AMOLED |
| 424 pixels per inch | 282 pixels per inch |
| 1300 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.2 | 7.3 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 665 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Kryo 260, 64-bit, 11 nm (Octa-Core 2000 MHz) processor |
| 8 GB RAM | 4 GB RAM |
| Adreno 660 GPU | Adreno 610 GPU |
| 9.63 | 9.09 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | microSDXC (up to 256 GB) external memory slot |
| 10.1 | 13.18 |
| Camera | |
| 12.00 MP + 10.00 MP | 48.00 MP + 32.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 26.00mm focal length | -- |
| 0.57 inches (1/1.76") sensor | 0.43 inches (1/2.3") sensor |
| 7680 x 4320 (24 fps) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1280 x 720 (240 fps) (HD) slow motion video |
| 10.78 | 11.44 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM |
| 10.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 4030mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 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, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Samsung Galaxy S21 has an overall score of 91.8, which is better than the Xiaomi Mi A3's 79.2 general score. Samsung Galaxy S21 is a newer cellphone, and it's also a little bit lighter and just a little thinner than Xiaomi Mi A3. Both phones in this comparison review include the same Android 11 OS (operating system).
Galaxy S21 features a little bit better performance than Xiaomi Mi A3, and although they both have the same number of cores, the Galaxy S21 also has a larger amount of RAM memory. Samsung Galaxy S21 has an incredibly better screen than Xiaomi Mi A3, because it has a lot more pixels per inch of display, a lot higher resolution of 1080 x 2400px and a quite larger screen.
The Xiaomi Mi A3 has a much greater storage to install applications and games or saving photos and videos than Galaxy S21, and although they both have exactly the same 128 GB internal storage, the Xiaomi Mi A3 also has a slot for an external memory card that allows up to 256 GB. The Xiaomi Mi A3 has a battery performance that's just as good as the battery duration in Galaxy S21, although the Xiaomi Mi A3 also has a 4030mAh battery capacity.
The Xiaomi Mi A3 features a little bit better camera than Samsung Galaxy S21, because although it has a much tinier sensor capturing way lower quality images, and they both have the same 3840x2160 (4K) video definition and a F1.8 camera aperture, the Xiaomi Mi A3 also counts with a much higher resolution camera and faster 30 fps video frame rates.
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