Compare phones
| Global Score | |
| 71.8 | 84.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 6.0 Marshmallow | Android 11, 10 |
| 2017-02-14 | 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 |
| Metal | Plastic and Plastic |
| -- | Scratch-Resistant Glass |
| $ 145.00 | -- |
| 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 |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 625 8953 chipset | Exynos 9611 chipset |
| ARM Cortex-A53, 64-bit, 14 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 506 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 | |
| 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 4.2 | 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
Samsung Galaxy M21 has a general score of 84.1, which is much better than the Xiaomi Redmi Note 4X's global score of 71.8. Samsung Galaxy M21 is a a lot newer phone than Xiaomi Redmi Note 4X, but it is just a bit thicker and heavier. These devices use Android OS, but the Samsung Galaxy M21 has older 11 version and Xiaomi Redmi Note 4X has Android 6.0 Marshmallow version.
Galaxy M21 has a bit better looking screen than Xiaomi Redmi Note 4X, because it has a bigger display, a bit greater number of pixels per inch of screen and a little bit higher resolution of 1080 x 2340. The Galaxy M21 counts with a much better memory capacity for games and applications than Xiaomi Redmi Note 4X, because it has 32 GB more internal memory and a SD memory slot that holds up to 512 GB.
Galaxy M21 features a bit more powerful processor than Xiaomi Redmi Note 4X, and although they both have the same number of cores, the Galaxy M21 also has more RAM memory. Galaxy M21 features a way better camera than Xiaomi Redmi Note 4X, and although they both have the same camera aperture, the Galaxy M21 also has a way more megapixels back facing camera and a way higher 3840x2160 video resolution.
Galaxy M21 features a much longer battery duration than Xiaomi Redmi Note 4X, because it has a 46 percent larger battery size.
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