Compare phones
| Global Score | |
| 74.1 | 84.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 7.0 Nougat, 6.0 Marshmallow | Android 11, 10 |
| 2017-01-23 | 2020-03-23 |
| 5.94 x 2.99 x 0.33 inches | 6.26 x 2.96 x 0.35 inches |
| 5.82 ounces | 6.63 ounces |
| 16 777 216 | Midnight blue and Raven black |
| Aluminum | Plastic and Plastic |
| -- | Scratch-Resistant Glass |
| $ 190.00 | -- |
| Display / Screen | |
| 5.5 inches | 6.4 inches |
| 1920 x 1080 pixels (Full HD) | 2340 x 1080 pixels |
| IPS LCD | Super AMOLED |
| 401 pixels per inch | 403 pixels per inch |
| 450 cd/m2 brightness | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.4 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 625 8953 chipset | Exynos 9611 chipset |
| ARM Cortex-A53, 64-bit (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 |
| Adreno 506 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 | |
| 13.00 MP + 5.00 MP | 48.00 MP + 20.00 MP |
| f/2.00 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| -- | 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 |
| 9.02 | 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 |
| Micro SIM | Nano SIM, Dual SIM |
| 6.1 | 6.7 |
| Battery Life | |
| 4100mAh Li - Polymer Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6 | 7.52 |
| Other Features | |
| Bluetooth 4.1 | Bluetooth 5.0 |
| GPS | GPS |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| -- | FM Radio |
Comparison review
The Galaxy M21 has an overall score of 84.1, which is much better than Xiaomi Redmi Note 4's global score of 74.1. Both phones in our current comparison work with Android operating system, but the Galaxy M21 has the previous 11 version and Xiaomi Redmi Note 4 has Android 7.0 Nougat. Even though Galaxy M21 is extremely newer than the Xiaomi Redmi Note 4, it's somewhat heavier and just a bit thicker.
Galaxy M21 and Xiaomi Redmi Note 4 have really similar screens, because although the Galaxy M21 has less brightness, it also counts with a slightly higher 1080 x 2340 resolution, a little greater pixels amount in each inch of display and a bigger display. The Samsung Galaxy M21 counts with more storage capacity to install applications and games or saving photos and videos than Xiaomi Redmi Note 4, and although they both have equal internal memory, the Samsung Galaxy M21 also has a SD memory card expansion slot that supports a maximum of 512 GB.
The Samsung Galaxy M21 has a little faster processing unit than Xiaomi Redmi Note 4. Both of them have 4 GB of RAM memory and 8 CPU cores. Galaxy M21 features a way better battery lifetime than Xiaomi Redmi Note 4, because it has a 6000mAh battery size instead of 4100mAh. The Samsung Galaxy M21 has a much better camera than Xiaomi Redmi Note 4, and although they both have the same aperture, the Samsung Galaxy M21 also has a lot more megapixels back-facing camera and a lot higher (4K) video quality.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.