Compare phones
| Global Score | |
| 76.6 | 91.8 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 10 | Android 11 |
| 2020-05-20 | 2021-01-29 |
| 6.39 x 3.04 x 0.35 inches | 5.97 x 2.80 x 0.31 inches |
| 7.02 ounces | 6.03 ounces |
| Forest green, Midnight gray and Polar white | Gray, Phantom pink, Violet and White |
| Plastic | Aluminum and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 283.00 | $ 722.00 |
| Display / Screen | |
| 6.5 inches | 6.2 inches |
| 2340 x 1080 pixels | 2400 x 1080 pixels |
| IPS LCD | Dynamic AMOLED |
| 396 pixels per inch | 424 pixels per inch |
| -- | 1300 cd/m2 brightness |
| No touch screen | No touch screen |
| 8 | 9.2 |
| Performance | |
| MediaTek Helio G85 chipset | Qualcomm Snapdragon 888 chipset |
| Arm Cortex-A75 and ArmCortex-A55, 64-bit, 12 nm (Octa-Core 2000 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 3 GB RAM | 8 GB RAM |
| Mali G52 MC2 GPU | Adreno 660 GPU |
| 9.09 | 9.63 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 128 GB) external memory slot | No SD card slot |
| 10.02 | 10.1 |
| Camera | |
| 48.00 MP + 13.00 MP | 12.00 MP + 10.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| -- | 26.00mm focal length |
| 0.5 inches (1/2") sensor | 0.57 inches (1/1.76") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1280 x 720 (120 fps) (HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 11 | 10.78 |
| 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 | |
| 5020mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 6.8 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
Samsung Galaxy S21 has a score of 91.8, which is much better than the Xiaomi Redmi Note 9's 76.6 global score. Both phones we are comparing here have Android OS (Operating System), but the Samsung Galaxy S21 has the newer 11 version and Xiaomi Redmi Note 9 has Android 10. Although the Samsung Galaxy S21 and the Xiaomi Redmi Note 9 were released with only 8 months difference, the Samsung Galaxy S21 is lighter and thinner.
The Samsung Galaxy S21 features a bit more powerful processing unit than Xiaomi Redmi Note 9, and although they both have 8 cores, the Samsung Galaxy S21 also has a higher amount of RAM. The Galaxy S21 has a better looking screen than Xiaomi Redmi Note 9, because although it has a quite smaller screen, it also counts with a just a little more pixels per inch in the display and a little higher resolution of 1080 x 2400px.
The Galaxy S21 features a little bit better storage capacity for applications, games, photos and videos than Xiaomi Redmi Note 9, because although it has no slot for an SD memory card, it also counts with 64 GB more internal storage. The Xiaomi Redmi Note 9 features longer battery performance than Samsung Galaxy S21, because it has 5020mAh of battery capacity instead of 4000mAh.
The Xiaomi Redmi Note 9 shoots clearer photos and videos than Samsung Galaxy S21, because although it has a tinier back camera sensor taking less light and washed colors, and they both have a F1.8 camera aperture and the same video definition, the Xiaomi Redmi Note 9 also counts with higher video frame rates and a way more mega-pixels back facing camera.
Galaxy S21 is way more expensive than Xiaomi Redmi Note 9, but you can get a better phone for that few more dollars.
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