Compare phones
| Global Score | |
| 91.8 | 76.6 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 10 |
| 2021-01-29 | 2020-05-20 |
| 5.97 x 2.80 x 0.31 inches | 6.39 x 3.04 x 0.35 inches |
| 6.03 ounces | 7.02 ounces |
| Gray, Phantom pink, Violet and White | Forest green, Midnight gray and Polar white |
| Aluminum and Plastic | Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 722.00 | $ 283.00 |
| Display / Screen | |
| 6.2 inches | 6.5 inches |
| 2400 x 1080 pixels | 2340 x 1080 pixels |
| Dynamic AMOLED | IPS LCD |
| 424 pixels per inch | 396 pixels per inch |
| 1300 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.2 | 8 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | MediaTek Helio G85 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Arm Cortex-A75 and ArmCortex-A55, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 8 GB RAM | 3 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 HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 10.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 5020mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 5.92 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | 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
The Samsung Galaxy S21 has an overall score of 91.8, which is better than the Xiaomi Redmi Note 9's overall score of 76.6. The Samsung Galaxy S21 construction is lighter and somewhat thinner than the Xiaomi Redmi Note 9, although both were released only 8 months apart. These devices include Android operating system, but the Samsung Galaxy S21 has newer 11 version while Xiaomi Redmi Note 9 has Android 10 version, counting with a lot of extra features.
The Samsung Galaxy S21 has a bit superior processor than Xiaomi Redmi Note 9, and although they both have the same number of cores, the Samsung Galaxy S21 also has more RAM memory. Galaxy S21 counts with a sharper screen than Xiaomi Redmi Note 9, because although it has a bit smaller screen, it also counts with a bit higher resolution of 1080 x 2400 pixels and a quite greater amount of pixels per inch in the display.
The Xiaomi Redmi Note 9 takes a bit better pictures and videos than Samsung Galaxy S21, because although it has a smaller camera sensor taking worse quality videos and pictures, and they both have the same video definition and the same aperture, the Xiaomi Redmi Note 9 also counts with higher video frame rates and a camera in the back with a way higher resolution.
Galaxy S21 has a bit bigger memory capacity for apps and games than Xiaomi Redmi Note 9, because although it has no SD card slot, it also counts with 128 GB internal memory. The Xiaomi Redmi Note 9 has improved battery performance than Galaxy S21, because it has a 26% bigger battery size.
The Galaxy S21 costs a lot more than the Xiaomi Redmi Note 9, but it's still a great deal, as you can get a better phone for that extra money.
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