Compare phones
| Global Score | |
| 76.7 | 84.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 11 | Android 11, 10 |
| 2021-05-27 | 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 |
| Moonlight White, Neptune Blue and Space Black, | Midnight blue and Raven black |
| Glass and Plastic | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| 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 | |
| MediaTek Helio G85 MT6769Z chipset | Exynos 9611 chipset |
| Cortex-A75, 64-bit, 12 nm (Octa-Core 2000 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Mali G52 MC2 GPU | Mali-G72 MP3 GPU |
| 9.09 | 9.27 |
| Storage | |
| 64 GB internal memory | 64 GB internal memory |
| microSDXC (up to 128 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 10.02 | 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 |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (120 fps) (HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 11 | 11.55 |
| 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 | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 7.52 |
| Other Features | |
| Bluetooth 5.2 | 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
The Galaxy M21 is a bit better than Xiaomi Redmi Note 8 2021, having an 84.1 score against 76.7. These phones come with the same Android 11 operating system. The Galaxy M21 design is just a little bit lighter than the Xiaomi Redmi Note 8 2021, although it's a bit thicker and was released only 14 months before.
The Galaxy M21 counts with a little more vivid display than Xiaomi Redmi Note 8 2021, because although it has a just a little worse count of pixels per inch of screen, and they both have an equal 1080 x 2340 pixels resolution, the Galaxy M21 also counts with a little bit larger screen. The Galaxy M21 counts with just a little better performance than Xiaomi Redmi Note 8 2021. They have the same number of cores and 4 GB of RAM memory.
The Galaxy M21 shoots clearer photos and videos than Xiaomi Redmi Note 8 2021, because although it has a smaller aperture which is not favorable for shooting pictures and/or video in poorly lited situations, and they both have a 0.5 inches back camera sensor and a same resolution back facing camera, the Galaxy M21 also counts with a lot higher 3840x2160 (4K) video quality.
Samsung Galaxy M21 has a greater memory capacity for apps and games than Xiaomi Redmi Note 8 2021, and although they both have exactly the same internal storage capacity, the Samsung Galaxy M21 also has a SD memory card expansion slot that holds a maximum of 512 GB. Galaxy M21 has a really longer battery lifetime than Xiaomi Redmi Note 8 2021, because it has a 50 percent larger battery capacity.
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