Compare phones
| Global Score | |
| 83.3 | 98.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 10, 9.0 Pie, 8.0 Oreo | Android 11 |
| 2018-06-05 | 2021-01-29 |
| 6.10 x 2.94 x 0.30 inches | 6.50 x 2.98 x 0.35 inches |
| 6.17 ounces | 8.04 ounces |
| Black, Blue, Gold and White | Phantom black and Silver |
| Glass (Corning Gorilla Glass 5) | Aluminum and Glass (Corning Gorilla Glass Victus) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 966.00 |
| Display / Screen | |
| 6.2 inches | 6.8 inches |
| 2248 x 1080 pixels | 3200 x 1440 pixels |
| AMOLED | Dynamic AMOLED |
| 402 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 845 SDM845 chipset | Qualcomm Snapdragon 888 chipset |
| Kryo 385, 64-bit, 10 nm (Octa-Core 2800 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 6 GB RAM | 12 GB RAM |
| Adreno 630 GPU | Adreno 660 GPU |
| 9.63 | 9.72 |
| Storage | |
| 256 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 13.3 | 10.1 |
| Camera | |
| 12.00 MP + 20.00 MP | 108.00 MP + 40.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 56.00mm focal length | 24.00mm focal length |
| 0.39 inches (1/2.55") 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 (960 fps) (HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 9.9 | 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, Dual SIM | Nano SIM |
| 6.7 | 10.7 |
| Battery Life | |
| 3400mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 5.36 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.1 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
The Galaxy S21 Ultra has a general score of 98.1, which is better than Xiaomi Mi 8's score of 83.3. These phones work with Android OS (Operating System), but the Galaxy S21 Ultra has 11 version while Xiaomi Mi 8 has Android 10. Galaxy S21 Ultra is a incredibly newer phone than the Xiaomi Mi 8, although it is thicker and extremely heavier.
Galaxy S21 Ultra has a much better looking screen than Xiaomi Mi 8, because it has a little bit bigger screen, a better 1440 x 3200px resolution, way more screen brightness and a better pixels density. The Xiaomi Mi 8 counts with much more storage capacity to store more apps and games than Galaxy S21 Ultra, because it has 256 GB internal storage capacity.
Galaxy S21 Ultra has a little faster processing unit than Xiaomi Mi 8, and although they both have a Octa-Core CPU, the Galaxy S21 Ultra also has a larger amount of RAM memory. Galaxy S21 Ultra has a much better camera than Xiaomi Mi 8, and although they both have a F1.8 diafragm aperture, the Galaxy S21 Ultra also has a way higher video quality, a lot larger back-facing camera sensor which provides a much better image and video quality and a way more mega-pixels camera in the back.
The Galaxy S21 Ultra counts with a very superior battery life than Xiaomi Mi 8, because it has a 5000mAh battery size instead of 3400mAh.
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