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