Compare phones
| Global Score | |
| 72.8 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 6.0 Marshmallow | Android 11, 10 |
| 2016-10-01 | 2020-03-23 |
| 6.17 x 3.02 x 0.28 inches | 6.26 x 2.96 x 0.35 inches |
| 6.42 ounces | 6.63 ounces |
| Blue, Gold and Silver | Midnight blue and Raven black |
| Aluminum and Aluminum | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 5.7 inches | 6.4 inches |
| 1920 x 1080 pixels (Full HD) | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 386 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8 | 8.4 |
| Performance | |
| Samsung Exynos 7 Octa 7420 chipset | Exynos 9611 chipset |
| ARM Cortex-A57 and ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 2100 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 3 GB RAM | 4 GB RAM |
| Yes GPU | Mali-G72 MP3 GPU |
| 9.09 | 9.27 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 8.88 | 11.74 |
| Camera | |
| 16.00 MP + 8.00 MP | 48.00 MP + 20.00 MP |
| f/1.90 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 |
| 9.13 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| -- | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 3 | 6.7 |
| Battery Life | |
| 3300mAh Li - Ion Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.28 | 7.52 |
| Other Features | |
| Bluetooth 4.1 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| -- | FM Radio |
Comparison review
Galaxy M21 is better than the Samsung Galaxy A8 (2016), with a global score of 84.1 against 72.8. Even though the Galaxy M21 is much newer than Samsung Galaxy A8 (2016), it is thicker and a little bit heavier. Both of these phones use Android operating system, but the Galaxy M21 has an older 11 version and Samsung Galaxy A8 (2016) has Android 6.0 Marshmallow version.
Galaxy M21 counts with a bit sharper screen than Samsung Galaxy A8 (2016), because it has a bit higher 1080 x 2340 pixels resolution, a bit more pixels per inch in the display and a quite bigger display. The Samsung Galaxy M21 counts with a much better storage capacity for applications, games, photos and videos than Galaxy A8 (2016), because it has 32 GB more internal storage capacity and a slot for an SD memory card that supports up to 512 GB.
Galaxy M21 features a little better processing power than Galaxy A8 (2016), and although they both have a Octa-Core CPU, the Galaxy M21 also has more RAM. Galaxy M21 captures much clearer photographs and videos than Galaxy A8 (2016), because although it has a tinier aperture, it also counts with a much better (4K) video definition and a back facing camera with way more mega pixels.
Galaxy M21 counts with a really longer battery life than Galaxy A8 (2016), because it has an 82% more battery size.
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