Compare phones
| Global Score | |
| 84.1 | 79.2 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | -- |
| 2020-03-23 | 2018-01-06 |
| 6.26 x 2.96 x 0.35 inches | 5.87 x 2.78 x 0.33 inches |
| 6.63 ounces | 6.07 ounces |
| Midnight blue and Raven black | Black, Blue, Gold and Orchid grey |
| Plastic and Plastic | Aluminum and Glass (Corning Gorilla Glass 5) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6.4 inches | 5.6 inches |
| 2340 x 1080 pixels | 2220 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 403 pixels per inch | 441 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 8.3 |
| Performance | |
| Exynos 9611 chipset | Samsung Exynos 5 Octa 7885 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 2200 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Mali-G72 MP3 GPU | Mali-G71 GPU |
| 9.27 | 9.18 |
| Storage | |
| 64 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 256 GB) external memory slot |
| 11.74 | 10.78 |
| Camera | |
| 48.00 MP + 20.00 MP | 16.00 MP + 16.00 MP |
| f/2.00 aperture | f/1.70 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | -- |
| 3840 x 2160 (30 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | -- |
| 11.55 | 9.24 |
| 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 and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.3 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 3000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 4.96 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| 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 | FM Radio |
Comparison review
Samsung Galaxy M21 is a bit better than Galaxy A8 (2018), getting a score of 84.1 against 79.2. Samsung Galaxy M21 is a much newer cellphone than Galaxy A8 (2018), but it's a bit thicker and just a little heavier. The Galaxy M21 counts with a little better hardware performance than Galaxy A8 (2018). Both have the same RAM amount and the same number of cores.
Samsung Galaxy M21 has a little bit better screen than Galaxy A8 (2018), because although it has a quite worse quantity of pixels per inch in the screen, it also counts with a slightly better resolution of 1080 x 2340 and a little bit bigger screen. Galaxy M21 has a slightly better memory for apps and games than Galaxy A8 (2018), and although they both have equal internal memory, the Galaxy M21 also has an external SD slot that admits a maximum of 512 GB.
The Galaxy M21 counts with a very superior battery duration than Samsung Galaxy A8 (2018), because it has a 100% bigger battery capacity. The Galaxy M21 captures much better photographs and videos than Galaxy A8 (2018), because although it has a smaller aperture, it also counts with a camera in the back with a way higher resolution and a way better 3840x2160 video definition.
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