Compare phones
| Global Score | |
| 91.8 | 76.7 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 11 |
| 2021-01-29 | 2021-05-27 |
| 5.97 x 2.80 x 0.31 inches | 6.23 x 2.96 x 0.33 inches |
| 6.03 ounces | 6.70 ounces |
| Gray, Phantom pink, Violet and White | Moonlight White, Neptune Blue and Space Black, |
| Aluminum and Plastic | Glass and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 722.00 | -- |
| Display / Screen | |
| 6.2 inches | 6.3 inches |
| 2400 x 1080 pixels | 2340 x 1080 pixels |
| Dynamic AMOLED | IPS LCD |
| 424 pixels per inch | 409 pixels per inch |
| 1300 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.2 | 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 |
| 8 GB RAM | 4 GB RAM |
| Adreno 660 GPU | Mali G52 MC2 GPU |
| 9.63 | 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 | |
| 12.00 MP + 10.00 MP | 48.00 MP + 13.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 26.00mm focal length | -- |
| 0.57 inches (1/1.76") 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 |
| 10.78 | 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 | |
| 4000mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 5.92 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | 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
Galaxy S21 has a general score of 91.8, which is much better than Xiaomi Redmi Note 8 2021's score of 76.7. Galaxy S21 is a lighter and a little bit thinner cellphone than Xiaomi Redmi Note 8 2021, although they were released only 4 months apart. Both of these phones include the same Android 11 operating system, so both of them should count with identical OS features.
The Galaxy S21 has a more vivid screen than Xiaomi Redmi Note 8 2021, because although it has a bit smaller screen, it also counts with a just a little better pixels density and a little higher 1080 x 2400 resolution. Galaxy S21 has a little bit better memory capacity for games and applications than Xiaomi Redmi Note 8 2021, because although it has no slot for external memory cards, it also counts with 128 GB internal storage capacity.
The Samsung Galaxy S21 counts with a little faster CPU than Xiaomi Redmi Note 8 2021, and although they both have the same number of cores, the Samsung Galaxy S21 also has 4 GB more RAM. Xiaomi Redmi Note 8 2021's battery life is very similar to Galaxy S21's battery lifetime. The Xiaomi Redmi Note 8 2021 captures slightly better photos and videos than Galaxy S21, because although it has a tinier sensor shooting lower quality videos and images, and they both have the same aperture and the same 1920x1080 (Full HD) video resolution, the Xiaomi Redmi Note 8 2021 also counts with a way more mega-pixels back-facing camera and better video frame rates.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.