Compare phones
| Global Score | |
| 78 | 84.1 |
| Basic Information | |
| Xiaomi | Samsung |
| -- | Android 11, 10 |
| 2018-07-27 | 2020-03-23 |
| 6.25 x 2.97 x 0.29 inches | 6.26 x 2.96 x 0.35 inches |
| 5.93 ounces | 6.63 ounces |
| Black, Blue, Gold, Pink and Red | Midnight blue and Raven black |
| Aluminum | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6 inches | 6.4 inches |
| 2160 x 1080 pixels | 2340 x 1080 pixels |
| IPS LCD | Super AMOLED |
| 402 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.1 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 660 SDM660 chipset | Exynos 9611 chipset |
| Kryo 260, 64-bit, 14 nm (Octa-Core 2200 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 6 GB RAM | 4 GB RAM |
| Adreno 512 GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.27 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 10.1 | 11.74 |
| Camera | |
| 12.00 MP + 20.00 MP | 48.00 MP + 20.00 MP |
| f/1.80 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| 0.34 inches (1/2.9") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) 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 |
| 9.79 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.3 | 6.7 |
| Battery Life | |
| 3010mAh Li - Polymer Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 4.96 | 7.52 |
| Other Features | |
| Bluetooth 5.0 | 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 | FM Radio |
Comparison review
The Samsung Galaxy M21 has a general score of 84.1, which is just a bit better than Xiaomi Mi A2's 78 overall score. Samsung Galaxy M21's body is newer, but thicker and heavier than the Xiaomi Mi A2. Galaxy M21 features a bit better looking display than Xiaomi Mi A2, because it has a just a bit greater quantity of pixels in each inch of display, a slightly higher 1080 x 2340 resolution and a little bit bigger display.
The Samsung Galaxy M21 features a better storage to store more apps and games than Xiaomi Mi A2, because although it has only 64 GB internal memory capacity, it also counts with a slot for SD memory cards that holds up to 512 GB. Galaxy M21 features a processing unit that's just as good as the Xiaomi Mi A2 one, and although the Galaxy M21 has a smaller amount of RAM memory, they both have 8 CPU cores.
The Galaxy M21 has a really longer battery performance than Xiaomi Mi A2, because it has a 6000mAh battery size. Samsung Galaxy M21 has a better camera than Xiaomi Mi A2, because although it has a tinier aperture, and they both have the same video resolution and the same video frame rates, the Samsung Galaxy M21 also counts with a lot better resolution camera in the back and a way larger sensor taking more light and vivid colors.
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