Compare phones
| Global Score | |
| 77.7 | 76.6 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 10 | Android 10 |
| 2020-06-19 | 2020-05-20 |
| 6.44 x 2.96 x 0.35 inches | 6.39 x 3.04 x 0.35 inches |
| 6.77 ounces | 7.02 ounces |
| Black, Blue, Red and White | Forest green, Midnight gray and Polar white |
| -- | Plastic |
| -- | Scratch-Resistant Glass |
| -- | $ 283.00 |
| Display / Screen | |
| 6.5 inches | 6.5 inches |
| 1600 x 720 pixels | 2340 x 1080 pixels |
| TFT | IPS LCD |
| 270 pixels per inch | 396 pixels per inch |
| No touch screen | No touch screen |
| 7.2 | 8 |
| Performance | |
| Samsung Exynos 850 chipset | MediaTek Helio G85 chipset |
| Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor | Arm Cortex-A75 and ArmCortex-A55, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 3 GB RAM | 3 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 HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 5020mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6.8 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | 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
The Samsung Galaxy A21s has a global score of 77.7, which is a bit better than Xiaomi Redmi Note 9's global score of 76.6. Both phones in this review have the same Android 10 OS (Operating System), so you shouldn't notice any difference in that aspect. The Samsung Galaxy A21s construction has the same thickness than the Xiaomi Redmi Note 9, but it's a little bit lighter.
The Xiaomi Redmi Note 9 has a processing unit that's very similar to the Galaxy A21s one, both of them have a 3 GB RAM memory and the same number of cores. The Xiaomi Redmi Note 9 counts with a much better display than Galaxy A21s, and although they both have a screen of the same size, the Xiaomi Redmi Note 9 also has a better count of pixels per inch of display and a much higher resolution of 1080 x 2340px.
Xiaomi Redmi Note 9 features a slightly better camera than Galaxy A21s, and although they both have the same resolution back camera, the same video frame rates, a same size sensor and the same (Full HD) video resolution, the Xiaomi Redmi Note 9 also has a bigger camera aperture to take better captures and videos in low light situations.
Xiaomi Redmi Note 9 has a bit bigger memory for apps and games than Samsung Galaxy A21s, because although it has a SD memory card expansion slot that holds a maximum of 128 GB against 512 GB, it also counts with 32 GB more internal memory capacity. The Xiaomi Redmi Note 9's battery duration is just as good as the battery life in Galaxy A21s, although the Xiaomi Redmi Note 9 also has 5020mAh of battery capacity.
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