Compare phones
| Global Score | |
| 77.7 | 76.7 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 10 | Android 11 |
| 2020-06-19 | 2021-05-27 |
| 6.44 x 2.96 x 0.35 inches | 6.23 x 2.96 x 0.33 inches |
| 6.77 ounces | 6.70 ounces |
| Black, Blue, Red and White | Moonlight White, Neptune Blue and Space Black, |
| -- | Glass and Plastic |
| -- | Scratch-Resistant Glass |
| Display / Screen | |
| 6.5 inches | 6.3 inches |
| 1600 x 720 pixels | 2340 x 1080 pixels |
| TFT | IPS LCD |
| 270 pixels per inch | 409 pixels per inch |
| No touch screen | No touch screen |
| 7.2 | 8.1 |
| Performance | |
| Samsung Exynos 850 chipset | MediaTek Helio G85 MT6769Z chipset |
| Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor | Cortex-A75, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 3 GB RAM | 4 GB RAM |
| Mali-G76 GPU | Mali G52 MC2 GPU |
| 9.09 | 9.09 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 128 GB) external memory slot |
| 9.84 | 10.02 |
| Camera | |
| 48.00 MP + 13.00 MP | 48.00 MP + 13.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | 0.5 inches (1/2") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| -- | 1280 x 720 (120 fps) (HD) slow motion video |
| 10.78 | 11 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.7 | 6.6 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6.8 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.2 |
| GPS | GPS |
| NFC | -- |
| -- | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
Comparison review
Samsung Galaxy A21s has a general score of 77.7, which is just a bit better than Xiaomi Redmi Note 8 2021's general score of 76.7. These devices come with Android OS (operating system), but Samsung Galaxy A21s has the older 10 version while Xiaomi Redmi Note 8 2021 has Android 11. Despite being the best cellphone in this comparison review, the Samsung Galaxy A21s design is older, a bit heavier and just a little thicker than Xiaomi Redmi Note 8 2021.
The Xiaomi Redmi Note 8 2021 features a brighter screen than Galaxy A21s, because although it has a quite smaller screen, it also counts with way more pixels per inch of screen and a way better 1080 x 2340 resolution. Xiaomi Redmi Note 8 2021's processing unit is just as good as the CPU in Galaxy A21s, and although the Xiaomi Redmi Note 8 2021 has a larger amount of RAM, they both have the same number of cores.
The Xiaomi Redmi Note 8 2021 features a little bit more storage capacity to store more games and applications than Samsung Galaxy A21s, because although it has an external SD slot that supports 384 GB smaller, it also counts with 64 GB internal memory capacity. Xiaomi Redmi Note 8 2021 shoots just a bit better videos and photos than Galaxy A21s, and although they both have the same video frame rates, the same 1920x1080 (Full HD) video quality, a 0.5 inches sensor and the same resolution camera, the Xiaomi Redmi Note 8 2021 also has a bigger camera aperture to take better low light photography.
The Galaxy A21s counts with better battery duration than Xiaomi Redmi Note 8 2021, because it has a 25 percent larger battery size.
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