Compare phones
| Global Score | |
| 78 | 98.1 |
| Basic Information | |
| Xiaomi | Samsung |
| -- | Android 11 |
| 2018-07-27 | 2021-01-29 |
| 6.25 x 2.97 x 0.29 inches | 6.50 x 2.98 x 0.35 inches |
| 5.93 ounces | 8.04 ounces |
| Black, Blue, Gold, Pink and Red | Phantom black and Silver |
| Aluminum | Aluminum and Glass (Corning Gorilla Glass Victus) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 966.00 |
| Display / Screen | |
| 6 inches | 6.8 inches |
| 2160 x 1080 pixels | 3200 x 1440 pixels |
| IPS LCD | Dynamic AMOLED |
| 402 pixels per inch | 516 pixels per inch |
| -- | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.1 | 9.8 |
| Performance | |
| Qualcomm Snapdragon 660 SDM660 chipset | Qualcomm Snapdragon 888 chipset |
| Kryo 260, 64-bit, 14 nm (Octa-Core 2200 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 6 GB RAM | 12 GB RAM |
| Adreno 512 GPU | Adreno 660 GPU |
| 9.27 | 9.72 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 10.1 |
| Camera | |
| 12.00 MP + 20.00 MP | 108.00 MP + 40.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| -- | 24.00mm focal length |
| 0.34 inches (1/2.9") 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 (120 fps) (HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 9.79 | 13.75 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.3 | 10.7 |
| Battery Life | |
| 3010mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 4.96 | 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
Galaxy S21 Ultra has an overall score of 98.1, which is way better than the Xiaomi Mi A2's global score of 78. Galaxy S21 Ultra is a much newer device than the Xiaomi Mi A2, although it is incredibly heavier and thicker. The Samsung Galaxy S21 Ultra counts with a bit faster processing unit than Xiaomi Mi A2, and although they both have a Octa-Core processing unit, the Samsung Galaxy S21 Ultra also has a greater amount of RAM memory.
Galaxy S21 Ultra has a lot better screen than Xiaomi Mi A2, because it has a little bit larger display, a higher resolution of 1440 x 3200px and a higher number of pixels per inch of display. The Samsung Galaxy S21 Ultra and Xiaomi Mi A2 have quite similar memory capacity for games and applications, both have exactly the same internal memory capacity.
Galaxy S21 Ultra has a lot better camera than Xiaomi Mi A2, and although they both have the same camera aperture, the Galaxy S21 Ultra also has a much higher 7680x4320 video resolution, a camera in the back with a much better 108 mega-pixels resolution and a lot larger sensor providing a lot better image quality.
The Samsung Galaxy S21 Ultra has a way better battery life than Xiaomi Mi A2, because it has 5000mAh of battery capacity instead of 3010mAh.
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