Compare phones
| Global Score | |
| 84.1 | 76.6 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11, 10 | Android 10 |
| 2020-03-23 | 2020-05-20 |
| 6.26 x 2.96 x 0.35 inches | 6.39 x 3.04 x 0.35 inches |
| 6.63 ounces | 7.02 ounces |
| Midnight blue and Raven black | Forest green, Midnight gray and Polar white |
| Plastic and Plastic | Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 283.00 |
| Display / Screen | |
| 6.4 inches | 6.5 inches |
| 2340 x 1080 pixels | 2340 x 1080 pixels |
| Super AMOLED | IPS LCD |
| 403 pixels per inch | 396 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 8 |
| Performance | |
| Exynos 9611 chipset | MediaTek Helio G85 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Arm Cortex-A75 and ArmCortex-A55, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 4 GB RAM | 3 GB RAM |
| Mali-G72 MP3 GPU | Mali G52 MC2 GPU |
| 9.27 | 9.09 |
| Storage | |
| 64 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 128 GB) external memory slot |
| 11.74 | 10.02 |
| Camera | |
| 48.00 MP + 20.00 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 |
| 3840 x 2160 (30 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | 1280 x 720 (120 fps) (HD) slow motion video |
| 11.55 | 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 | |
| 6000mAh Li - Polymer Battery | 5020mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| 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 |
| FM Radio | -- |
Comparison review
The Galaxy M21 is slightly better than Xiaomi Redmi Note 9, having a global score of 84.1 against 76.6. The Galaxy M21 body has the same thickness than the Xiaomi Redmi Note 9, but it is a little bit lighter. Both phones we are comparing here work with Android operating system, but the Galaxy M21 has 11 version and Xiaomi Redmi Note 9 has Android 10.
Galaxy M21 has a little faster processor than Xiaomi Redmi Note 9, and although they both have 8 cpu cores, the Galaxy M21 also has a higher amount of RAM. The Samsung Galaxy M21 features a slightly better looking screen than Xiaomi Redmi Note 9, because although it has a quite smaller display, and they both have an equal resolution of 1080 x 2340px, the Samsung Galaxy M21 also counts with a just a bit greater pixels density.
Samsung Galaxy M21 has a slightly better camera than Xiaomi Redmi Note 9, because although it has a smaller camera aperture which is not favorable for capturing photographs or videos in low-light situations, and they both have a 0.5 inches back-facing camera sensor and a back facing camera with a 48 megapixels resolution, the Samsung Galaxy M21 also counts with a much better 3840x2160 video quality.
The Samsung Galaxy M21 counts with a better memory capacity for applications and games than Xiaomi Redmi Note 9, and although they both have exactly the same internal memory capacity, the Samsung Galaxy M21 also has an external memory card slot that allows up to 512 GB. Galaxy M21 has superior battery lifetime than Xiaomi Redmi Note 9, because it has 6000mAh of battery capacity against 5020mAh.
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