Compare phones
| Global Score | |
| 11.67 | 9.15 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 11 |
| 2021-01-29 | 2021-05-27 |
| 6.50 x 2.98 x 0.35 inches | 6.23 x 2.96 x 0.33 inches |
| 8.04 ounces | 6.70 ounces |
| Phantom black and Silver | Moonlight White, Neptune Blue and Space Black, |
| Aluminum and Glass (Corning Gorilla Glass Victus) | Glass and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 966.00 | -- |
| Display / Screen | |
| 6.8 inches | 6.3 inches |
| 3200 x 1440 pixels | 2340 x 1080 pixels |
| Dynamic AMOLED | IPS LCD |
| 516 pixels per inch | 409 pixels per inch |
| 1500 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.8 | 8.1 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | MediaTek Helio G85 MT6769Z chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Cortex-A75, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 12 GB RAM | 4 GB RAM |
| Adreno 660 GPU | Mali G52 MC2 GPU |
| 9.72 | 9.09 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 128 GB) external memory slot |
| 10.1 | 10.02 |
| Camera | |
| 108.00 MP + 40.00 MP | 48.00 MP + 13.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 24.00mm focal length | -- |
| 0.75 inches (1/1.33") sensor | 0.5 inches (1/2") sensor |
| 7680 x 4320 (24 fps) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1280 x 720 (120 fps) (HD) slow motion video |
| 13.75 | 11 |
| 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+ (4G), HSDPA and HSPA |
| Nano SIM | Nano SIM |
| 10.7 | 6.6 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 4.96 | 4.88 |
| Other Features | |
| Bluetooth 5.1 | Bluetooth 5.2 |
| GPS | GPS |
| 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
The Galaxy S21 Ultra has a score of 11.67, which is way better than Xiaomi Redmi Note 8 2021's general score of 9.15. These devices have the same Android 11 OS (operating system), so both of them should provide the same OS features. Even being the best we compare here, the Galaxy S21 Ultra body is just a little bit thicker and heavier than the Xiaomi Redmi Note 8 2021.
The Samsung Galaxy S21 Ultra has an incredibly better display than Xiaomi Redmi Note 8 2021, because it has a quite larger screen, a better 1440 x 3200 resolution and a higher screen pixels density. Galaxy S21 Ultra counts with a bit superior CPU than Xiaomi Redmi Note 8 2021, and although they both have 8 CPU cores, the Galaxy S21 Ultra also has more RAM.
The Samsung Galaxy S21 Ultra counts with a much better camera than Xiaomi Redmi Note 8 2021, and although they both have the same diafragm aperture, the Samsung Galaxy S21 Ultra also has a lot bigger back-facing camera sensor capturing lot better quality photos and videos, a lot better 7680x4320 video quality and a back camera with way more mega-pixels.
The Galaxy S21 Ultra features a bit more memory to store more apps and games than Xiaomi Redmi Note 8 2021, because although it has no external SD slot, it also counts with 128 GB internal memory. The Samsung Galaxy S21 Ultra has just a bit better battery duration than Xiaomi Redmi Note 8 2021, because it has a 25 percent greater battery capacity.