Compare phones
| Global Score | |
| 79 | 91.8 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 11, 10 | Android 11 |
| 2020-04-07 | 2021-01-29 |
| 6.53 x 3.02 x 0.35 inches | 5.97 x 2.80 x 0.31 inches |
| 7.37 ounces | 6.03 ounces |
| Aurora blue, Glacier white and Interstellar grey | Gray, Phantom pink, Violet and White |
| Glass (Corning Gorilla Glass 5) | Aluminum and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 249.00 | $ 722.00 |
| Display / Screen | |
| 6.7 inches | 6.2 inches |
| 2400 x 1080 pixels | 2400 x 1080 pixels |
| IPS LCD | Dynamic AMOLED |
| 393 pixels per inch | 424 pixels per inch |
| -- | 1300 cd/m2 brightness |
| No touch screen | No touch screen |
| 8 | 9.2 |
| Performance | |
| Qualcomm Snapdragon 720G SM7125 chipset | Qualcomm Snapdragon 888 chipset |
| Kryo 465, 64-bit, 8 nm (Octa-Core 2300 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 4 GB RAM | 8 GB RAM |
| Adreno 618 GPU | Adreno 660 GPU |
| 9.27 | 9.63 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 11.74 | 10.1 |
| Camera | |
| 48.00 MP + 16.00 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 |
| 3840 x 2160 (30 fps) (4K) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 11.55 | 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 |
| 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
Galaxy S21 is better than the Xiaomi Redmi Note 9S, getting a overall score of 91.8 against 79. Both of these phones work with the same Android 11 OS (operating system), so you shouldn't notice any difference in that aspect. The Galaxy S21 construction is newer, lighter and thinner than Xiaomi Redmi Note 9S.
Samsung Galaxy S21 has a bit superior processor than Xiaomi Redmi Note 9S, and although they both have 8 cpu cores, the Samsung Galaxy S21 also has 4 GB more RAM. The Galaxy S21 has a brighter screen than Xiaomi Redmi Note 9S, because although it has a bit smaller display, and they both have exactly the same 1080 x 2400 resolution, the Galaxy S21 also counts with a quite better amount of pixels in each inch of screen.
The Xiaomi Redmi Note 9S counts with just a bit better camera than Galaxy S21, because although it has a smaller sensor taking less light and washed colors, and they both have the same 3840x2160 video resolution and a same size aperture, the Xiaomi Redmi Note 9S also counts with higher 30 fps video frame rates and a much better resolution camera in the back.
The Xiaomi Redmi Note 9S has a quite bigger memory to install applications and games or saving photos and videos than Samsung Galaxy S21, because although it has 0 less internal storage capacity, it also counts with an external SD slot that supports a maximum of 512 GB. The Xiaomi Redmi Note 9S has superior battery performance than Galaxy S21, because it has a 26 percent greater battery size.
Although Galaxy S21 is a better device, it is a lot more expensive than the Xiaomi Redmi Note 9S, and it doesn't have such a good price and quality relation as the Xiaomi Redmi Note 9S. If you prefer to save a few dollars, you can get Xiaomi Redmi Note 9S, letting go some specs and features, but you'll get the most with your money.
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