Compare phones
| Global Score | |
| 76.7 | 77.7 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 11 | Android 10 |
| 2021-05-27 | 2020-06-19 |
| 6.23 x 2.96 x 0.33 inches | 6.44 x 2.96 x 0.35 inches |
| 6.70 ounces | 6.77 ounces |
| Moonlight White, Neptune Blue and Space Black, | Black, Blue, Red and White |
| Glass and Plastic | -- |
| Scratch-Resistant Glass | -- |
| Display / Screen | |
| 6.3 inches | 6.5 inches |
| 2340 x 1080 pixels | 1600 x 720 pixels |
| IPS LCD | TFT |
| 409 pixels per inch | 270 pixels per inch |
| No touch screen | No touch screen |
| 8.1 | 7.2 |
| Performance | |
| MediaTek Helio G85 MT6769Z chipset | Samsung Exynos 850 chipset |
| Cortex-A75, 64-bit, 12 nm (Octa-Core 2000 MHz) processor | Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor |
| 4 GB RAM | 3 GB RAM |
| Mali G52 MC2 GPU | Mali-G76 GPU |
| 9.09 | 9.09 |
| Storage | |
| 64 GB internal memory | 32 GB internal memory |
| microSDXC (up to 128 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 10.02 | 9.84 |
| Camera | |
| 48.00 MP + 13.00 MP | 48.00 MP + 13.00 MP |
| f/1.80 aperture | f/2.00 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 | -- |
| 11 | 10.78 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 6.6 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 6.8 |
| Other Features | |
| Bluetooth 5.2 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
Comparison review
The Galaxy A21s has a general score of 77.7, which is a little bit better than Xiaomi Redmi Note 8 2021's overall score of 76.7. Despite being the best phone in this comparison review, the Galaxy A21s is an older, just a bit thicker and a little bit heavier phone than the Xiaomi Redmi Note 8 2021. These phones come with Android operating system, but Galaxy A21s has the older 10 version and Xiaomi Redmi Note 8 2021 has Android 11.
The Xiaomi Redmi Note 8 2021 features a more vivid display than Galaxy A21s, because although it has a little smaller display, it also counts with a much higher 1080 x 2340px resolution and a much higher quantity of pixels per screen inch. Xiaomi Redmi Note 8 2021 features a bit more storage capacity for applications, games, photos and videos than Samsung Galaxy A21s, because although it has a slot for an external memory card that supports 384 GB smaller, it also counts with more internal memory capacity.
Galaxy A21s counts with a processor that is just as good as the Xiaomi Redmi Note 8 2021 one, and although the Galaxy A21s has less RAM memory, they both have a Octa-Core CPU. Galaxy A21s has greater battery life than Xiaomi Redmi Note 8 2021, because it has a 5000mAh battery size against 4000mAh.
Xiaomi Redmi Note 8 2021 has a bit better camera than Samsung Galaxy A21s, and although they both have a same size camera sensor, the same (Full HD) video resolution, a back-facing camera with a 48 MP resolution and the same video frame rates, the Xiaomi Redmi Note 8 2021 also has a larger aperture to capture better low light photos and video.
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