Compare phones
| Global Score | |
| 79.2 | 98.1 |
| 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 | 6.50 x 2.98 x 0.35 inches |
| 6.13 ounces | 8.04 ounces |
| Blue, Gray and White | Phantom black and Silver |
| Glass (Corning Gorilla Glass 5) and Plastic | Aluminum and Glass (Corning Gorilla Glass Victus) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 966.00 |
| Display / Screen | |
| 6.1 inches | 6.8 inches |
| 1560 x 720 pixels | 3200 x 1440 pixels |
| Super AMOLED | Dynamic AMOLED |
| 282 pixels per inch | 516 pixels per inch |
| -- | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.3 | 9.8 |
| 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 | 12 GB RAM |
| Adreno 610 GPU | Adreno 660 GPU |
| 9.09 | 9.72 |
| 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 | 108.00 MP + 40.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| -- | 24.00mm focal length |
| 0.43 inches (1/2.3") sensor | 0.75 inches (1/1.33") 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 | 13.75 |
| 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 | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 5.92 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.1 |
| 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
The Samsung Galaxy S21 Ultra has a global score of 98.1, which is way better than Xiaomi Mi A3's global score of 79.2. Samsung Galaxy S21 Ultra is a newer cellphone than the Xiaomi Mi A3, although it's way heavier and just a bit thicker. Both of these devices include the same Android 11 OS (Operating System).
The Samsung Galaxy S21 Ultra has a lot better display than Xiaomi Mi A3, because it has a quite larger screen, a lot higher resolution of 1440 x 3200 pixels and a lot higher pixel count per inch in the display. The Xiaomi Mi A3 features a much better memory to install games and applications than Samsung Galaxy S21 Ultra, and although they both have equal internal storage capacity, the Xiaomi Mi A3 also has a SD memory card expansion slot that allows up to 256 GB.
The Galaxy S21 Ultra features a little faster processor than Xiaomi Mi A3, and although they both have the same number of cores, the Galaxy S21 Ultra also has a greater amount of RAM memory. Galaxy S21 Ultra captures a lot better photographs and videos than Xiaomi Mi A3, and although they both have the same aperture, the Galaxy S21 Ultra also has a back facing camera with lot more mega-pixels, a lot better video definition and a way larger back camera sensor providing a lot better image quality.
The Galaxy S21 Ultra features superior battery performance than Xiaomi Mi A3, because it has a 24 percent more battery size.
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