Compare phones
| Global Score | |
| 79.2 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| -- | Android 11, 10 |
| 2018-01-06 | 2020-03-23 |
| 5.87 x 2.78 x 0.33 inches | 6.26 x 2.96 x 0.35 inches |
| 6.07 ounces | 6.63 ounces |
| Black, Blue, Gold and Orchid grey | Midnight blue and Raven black |
| Aluminum and Glass (Corning Gorilla Glass 5) | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 5.6 inches | 6.4 inches |
| 2220 x 1080 pixels | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 441 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.3 | 8.4 |
| Performance | |
| Samsung Exynos 5 Octa 7885 chipset | Exynos 9611 chipset |
| ARM Cortex-A73 and ARM Cortex-A53, 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 |
| 4 GB RAM | 4 GB RAM |
| Mali-G71 GPU | Mali-G72 MP3 GPU |
| 9.18 | 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 | |
| 16.00 MP + 16.00 MP | 48.00 MP + 20.00 MP |
| f/1.70 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 |
| -- | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 9.24 | 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 | |
| 3000mAh 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 |
| NFC | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Samsung Galaxy M21 has an overall score of 84.1, which is a bit better than the Galaxy A8 (2018)'s global score of 79.2. Even though Samsung Galaxy M21 is extremely newer than the Galaxy A8 (2018), it is just a little thicker and just a little bit heavier. The Samsung Galaxy M21 features a bit more powerful processor than Galaxy A8 (2018). Both have a 4 GB RAM and the same number of cores.
Galaxy M21 has a bit more vivid screen than Galaxy A8 (2018), because although it has a quite worse pixels density, it also counts with a bit higher 1080 x 2340 pixels resolution and a little bit larger screen. The Samsung Galaxy M21 features a slightly better memory capacity to install applications and games or saving photos and videos than Galaxy A8 (2018), and although they both have the same 64 GB internal storage capacity, the Samsung Galaxy M21 also has a slot for SD memory cards that holds up to 512 GB.
Galaxy M21 counts with a way better camera than Samsung Galaxy A8 (2018), because although it has a tinier camera aperture, it also counts with a way higher 3840x2160 video quality and a back camera with a lot better 48 mega pixels resolution. Galaxy M21 counts with a much longer battery duration than Galaxy A8 (2018), because it has a 100 percent more battery size.
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