Compare phones
| Global Score | |
| 74.6 | 84.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 10 | Android 11, 10 |
| 2019-10-16 | 2020-03-23 |
| 6.23 x 2.96 x 0.33 inches | 6.26 x 2.96 x 0.35 inches |
| 6.70 ounces | 6.63 ounces |
| Cosmic Purple, Moonlight White, Nebula Purple, Neptune Blue and Space Black | Midnight blue and Raven black |
| Glass and Plastic | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 227.00 | -- |
| Display / Screen | |
| 6.3 inches | 6.4 inches |
| 2340 x 1080 pixels | 2340 x 1080 pixels |
| IPS LCD | Super AMOLED |
| 409 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.1 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 665 SM6125 chipset | Exynos 9611 chipset |
| Kryo 260, 64-bit, 11 nm (Octa-Core 2000 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 3 GB RAM | 4 GB RAM |
| Adreno 610 GPU | Mali-G72 MP3 GPU |
| 9.09 | 9.27 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| microSDXC (up to 128 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 8.12 | 11.74 |
| Camera | |
| 48.00 MP + 13.00 MP | 48.00 MP + 20.00 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 |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (240 fps) (HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 11.44 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G) and HSPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.1 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 7.52 |
| Other Features | |
| Bluetooth 4.2 | Bluetooth 5.0 |
| GPS | GPS |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| -- | FM Radio |
Comparison review
Galaxy M21 is better than Xiaomi Redmi Note 8, with a score of 84.1 against 74.6. Even though Galaxy M21 and Xiaomi Redmi Note 8 were released only 5 months apart, Galaxy M21's design is a little bit thicker but just a bit lighter than Xiaomi Redmi Note 8. Both of these phones have Android OS, but Galaxy M21 has newer 11 version while Xiaomi Redmi Note 8 has Android 10 version, giving you a couple nice extra features and increased performance.
Galaxy M21 has a bit superior CPU than Xiaomi Redmi Note 8, and although they both have a Octa-Core CPU, the Galaxy M21 also has a greater amount of RAM. Galaxy M21 has a little more vivid screen than Xiaomi Redmi Note 8, because although it has a bit worse display pixels density, and they both have exactly the same resolution of 1080 x 2340px, the Galaxy M21 also counts with a bit larger screen.
Samsung Galaxy M21 has just a bit better camera than Xiaomi Redmi Note 8, although it has a tinier aperture which is worse for low-light captures and video, they both have the same 30 fps video frame rates, the same resolution camera in the back, a same size back camera sensor and the same 3840x2160 (4K) video definition.
The Samsung Galaxy M21 counts with a much bigger memory capacity for games and applications than Xiaomi Redmi Note 8, because it has a SD memory slot that allows up to 512 GB and 64 GB internal storage capacity. The Galaxy M21 has a really longer battery life than Xiaomi Redmi Note 8, because it has a 50% greater battery size.
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