Compare phones
| Global Score | |
| 83.2 | 98.1 |
| Basic Information | |
| Xiaomi | Samsung |
| -- | Android 11 |
| 2019-03-06 | 2021-01-29 |
| 6.20 x 2.94 x 0.30 inches | 6.50 x 2.98 x 0.35 inches |
| 6.10 ounces | 8.04 ounces |
| Black, Blue and Purple | Phantom black and Silver |
| Glass (Corning Gorilla Glass 5) and Metal | Aluminum and Glass (Corning Gorilla Glass Victus) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 966.00 |
| Display / Screen | |
| 6.4 inches | 6.8 inches |
| 2340 x 1080 pixels | 3200 x 1440 pixels |
| AMOLED | Dynamic AMOLED |
| 403 pixels per inch | 516 pixels per inch |
| 600 cd/m2 brightness | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.6 | 9.8 |
| Performance | |
| Qualcomm Snapdragon 855 chipset | Qualcomm Snapdragon 888 chipset |
| Kryo 485, 64-bit, 7 nm (Octa-Core 2840 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 6 GB RAM | 12 GB RAM |
| Adreno 640 GPU | Adreno 660 GPU |
| 9.63 | 9.72 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 10.1 |
| Camera | |
| 48.00 MP + 20.00 MP | 108.00 MP + 40.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 26.00mm focal length | 24.00mm focal length |
| 0.5 inches (1/2") sensor | 0.75 inches (1/1.33") sensor |
| 3840 x 2160 (60 fps) (4K) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1920 x 1080 (960 fps) (Full HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 12.1 | 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 | |
| 3300mAh Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 5.28 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.1 |
| GPS | GPS |
| NFC | 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 |
Comparison review
The Galaxy S21 Ultra is better than the Xiaomi Mi 9, getting a 98.1 score against 83.2. Galaxy S21 Ultra's construction is newer, but somewhat thicker and much heavier than the Xiaomi Mi 9. Galaxy S21 Ultra counts with a bit faster processor than Xiaomi Mi 9, and although they both have 8 CPU cores, the Galaxy S21 Ultra also has a higher amount of RAM.
Samsung Galaxy S21 Ultra features a more vivid screen than Xiaomi Mi 9, because it has a little bit larger screen, way more brightness, a better count of pixels per inch in the display and a better resolution of 1440 x 3200 pixels. Samsung Galaxy S21 Ultra counts with a better camera than Xiaomi Mi 9, and although they both have the same aperture, the Samsung Galaxy S21 Ultra also has a way larger sensor, a lot higher video quality and a back-facing camera with a way better 108 MP resolution.
Galaxy S21 Ultra and Xiaomi Mi 9 feature quite similar storage for applications, games, photos and videos, both have exactly the same internal memory capacity. Samsung Galaxy S21 Ultra counts with a much longer battery life than Xiaomi Mi 9, because it has a 52 percent more battery capacity.
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