Compare phones
| Global Score | |
| 84.1 | 76 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11, 10 | Android 6.0 Marshmallow |
| 2020-03-23 | 2016-11-01 |
| 6.26 x 2.96 x 0.35 inches | 6.15 x 3.04 x 0.30 inches |
| 6.63 ounces | 5.86 ounces |
| Midnight blue and Raven black | Black and Silver |
| Plastic and Plastic | Aluminum and Glass |
| Scratch-Resistant Glass | -- |
| -- | $ 516.00 |
| Display / Screen | |
| 6.4 inches | 5.7 inches |
| 2340 x 1080 pixels | 1920 x 1080 pixels (Full HD) |
| Super AMOLED | OLED |
| 403 pixels per inch | 386 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 7.9 |
| Performance | |
| Exynos 9611 chipset | Qualcomm Snapdragon 821 MSM8996 Pro chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Kryo, 64-bit (Quad-Core 2350 MHz) processor |
| 4 GB RAM | 6 GB RAM |
| Mali-G72 MP3 GPU | Adreno 530 GPU |
| 9.27 | 9.09 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 11.74 | 10.1 |
| Camera | |
| 48.00 MP + 20.00 MP | 23.00 MP + 8.00 MP |
| f/2.00 aperture | f/2.00 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | 0.38 inches (1/2.6") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (4K) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | -- |
| 11.55 | 8.69 |
| Networks | |
| Wi-Fi | Wi-Fi |
| 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 | 6.1 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 4070mAh Li - Ion Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 6 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 4.2 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
Galaxy M21 has a general score of 84.1, which is better than the Xiaomi Mi Note 2's 76 overall score. The Galaxy M21 design is a lot newer, but somewhat thicker and somewhat heavier than the Xiaomi Mi Note 2. Both phones in this comparison review come with Android OS (operating system), but the Galaxy M21 has the previous 11 version and Xiaomi Mi Note 2 has Android 6.0 Marshmallow version.
The Galaxy M21 has a bit better screen than Xiaomi Mi Note 2, because it has a little larger screen, a little bit higher resolution of 1080 x 2340 and a just a little more pixels per screen inch. The Samsung Galaxy M21 features a bit better performance than Xiaomi Mi Note 2, because although it has a lower amount of RAM memory, it also counts with a higher number of cores.
The Galaxy M21 has a way better camera than Xiaomi Mi Note 2, and although they both have the same camera aperture, the same (4K) video quality and the same video frame rate, the Galaxy M21 also has a way larger back camera sensor and a camera with a much better 48 megapixels resolution. The Galaxy M21 features a bigger storage for applications and games than Xiaomi Mi Note 2, because although it has only 64 GB internal storage, it also counts with a slot for SD memory cards that holds a maximum of 512 GB.
Galaxy M21 has a much longer battery lifetime than Xiaomi Mi Note 2, because it has a 6000mAh battery size instead of 4070mAh.
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