Compare phones
| Global Score | |
| 98.1 | 81.4 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 9.0 Pie |
| 2021-01-29 | 2019-04-15 |
| 6.50 x 2.98 x 0.35 inches | 5.81 x 2.78 x 0.29 inches |
| 8.04 ounces | 5.47 ounces |
| Phantom black and Silver | 16 777 216 |
| Aluminum and Glass (Corning Gorilla Glass Victus) | -- |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 966.00 | -- |
| Display / Screen | |
| 6.8 inches | 6 inches |
| 3200 x 1440 pixels | 2340 x 1080 pixels |
| Dynamic AMOLED | AMOLED |
| 516 pixels per inch | 430 pixels per inch |
| 1500 cd/m2 brightness | 600 cd/m2 brightness |
| No touch screen | No touch screen |
| 9.8 | 8.7 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 712 SDM712 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Kryo 360, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 12 GB RAM | 6 GB RAM |
| Adreno 660 GPU | Adreno 616 GPU |
| 9.72 | 9.36 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 10.1 |
| Camera | |
| 108.00 MP + 40.00 MP | 48.00 MP + 20.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 24.00mm focal length | 26.00mm focal length |
| 0.75 inches (1/1.33") sensor | 0.5 inches (1/2") sensor |
| 7680 x 4320 (24 fps) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 13.75 | 11.66 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 10.7 | 6.3 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 3070mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 6.8 | 5.04 |
| Other Features | |
| Bluetooth 5.1 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| -- | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
Samsung Galaxy S21 Ultra has a global score of 98.1, which is way better than Xiaomi Mi 9 SE's 81.4 global score. Both of these phones work with Android OS, but Samsung Galaxy S21 Ultra has the older 11 version while Xiaomi Mi 9 SE has Android 9.0 Pie version. Samsung Galaxy S21 Ultra's construction is newer, but somewhat thicker and incredibly heavier than Xiaomi Mi 9 SE.
The Samsung Galaxy S21 Ultra counts with a more vivid display than Xiaomi Mi 9 SE, because it has a much brighter display, a just a little greater amount of pixels per inch in the screen, a higher resolution of 1440 x 3200px and a quite bigger screen. Xiaomi Mi 9 SE's storage capacity to install applications and games is very similar to the Galaxy S21 Ultra one, both have equal internal memory capacity.
The Samsung Galaxy S21 Ultra has a bit better processing unit than Xiaomi Mi 9 SE, and although they both have 8 CPU cores, the Samsung Galaxy S21 Ultra also has a larger amount of RAM. The Samsung Galaxy S21 Ultra features a very superior battery life than Xiaomi Mi 9 SE, because it has a 63 percent more battery capacity.
The Galaxy S21 Ultra counts with a superior camera than Xiaomi Mi 9 SE, and although they both have a same size aperture, the Galaxy S21 Ultra also has a much bigger sensor which gives a much better photo and video quality, a way higher video quality and a camera in the back with much more mega-pixels.
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