Compare phones
| Global Score | |
| 81.7 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| -- | Android 11, 10 |
| 2017-04-21 | 2020-03-23 |
| 5.86 x 2.68 x 0.31 inches | 6.26 x 2.96 x 0.35 inches |
| 5.47 ounces | 6.63 ounces |
| Arctic silver, Burgundy red, Coral blue, Maple gold, Midnight black, Orchid gray and Rose pink | Midnight blue and Raven black |
| Aluminum and Glass (Corning Gorilla Glass 5) | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 173.00 | -- |
| Display / Screen | |
| 5.8 inches | 6.4 inches |
| 2960 x 1440 pixels | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 568 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.9 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 835 MSM8998 chipset | Exynos 9611 chipset |
| Kryo 280, 64-bit, 10 nm (Octa-Core 2350 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 540 GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.27 |
| Storage | |
| 64 GB internal memory | 64 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 10.78 | 11.74 |
| Camera | |
| 12.00 MP + 8.00 MP | 48.00 MP + 20.00 MP |
| f/1.70 aperture | f/2.00 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.39 inches (1/2.55") 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 (240 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+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 3000mAh Li - Ion Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 4.96 | 7.52 |
| Other Features | |
| Bluetooth 5.0, EDR | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| -- | FM Radio |
Comparison review
The Galaxy M21 has a score of 84.1, which is a bit better than the Samsung Galaxy S8's 81.7 global score. Galaxy M21's body is noticeably newer, but somewhat thicker and somewhat heavier than Samsung Galaxy S8. Galaxy S8 and Galaxy M21 count with similar CPUs, both have 4 GB of RAM and the same number of cores.
Galaxy S8 counts with a slightly better screen than Samsung Galaxy M21, because although it has a little bit smaller display, it also counts with a higher resolution of 1440 x 2960px and a greater pixel number in each inch in the display. Samsung Galaxy M21 features a slightly bigger memory for games and applications than Samsung Galaxy S8, and although they both have exactly the same internal storage capacity, the Samsung Galaxy M21 also has a SD card slot that admits a maximum of 512 GB.
Galaxy M21 takes much better videos and photos than Samsung Galaxy S8, because although it has a tinier aperture which is not so good for low light photos and video, and they both have the same video frame rates and the same video definition, the Galaxy M21 also counts with a much larger sensor which gives a much higher photo and video quality and a way more mega-pixels back-facing camera.
Galaxy M21 features a very superior battery lifetime than Galaxy S8, because it has a 100 percent larger battery capacity.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.