Compare phones
| Global Score | |
| 76.7 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 10, 8.0 Oreo | Android 11, 10 |
| 2018-06-28 | 2020-03-23 |
| 6.27 x 2.98 x 0.32 inches | 6.26 x 2.96 x 0.35 inches |
| 6.24 ounces | 6.63 ounces |
| Black, Blue, Gold and Pink | Midnight blue and Raven black |
| Plastic | Plastic and Plastic |
| -- | Scratch-Resistant Glass |
| Display / Screen | |
| 6 inches | 6.4 inches |
| 1480 x 720 pixels | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 274 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.2 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 450 SDM450 chipset | Exynos 9611 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1800 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 506 GPU | Mali-G72 MP3 GPU |
| 8.91 | 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 | 26.00mm focal length |
| 0.36 inches (1/2.8") sensor | 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 |
| 9.46 | 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 | |
| 3500mAh Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.44 | 7.52 |
| Other Features | |
| Bluetooth 4.2 | Bluetooth 5.0 |
| GPS | GPS |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Samsung Galaxy M21 is a bit better than the Galaxy J8, with a score of 84.1 against 76.7. Both of these devices have Android OS (operating system), but the Samsung Galaxy M21 has 11 version while Galaxy J8 has Android 10 version, giving some nice extra features and better performance. Although Samsung Galaxy M21 is newer than Galaxy J8, it is a bit thicker and a little heavier.
The Samsung Galaxy M21 has a bit faster CPU than Samsung Galaxy J8. Both have a 4 GB RAM memory and a Octa-Core CPU. The Samsung Galaxy M21 features a sharper screen than Samsung Galaxy J8, because it has a lot higher 1080 x 2340 resolution, more pixels per inch in the screen and a little larger screen.
Samsung Galaxy M21 counts with a bit more storage for games and applications than Galaxy J8, and although they both have equal internal memory capacity, the Samsung Galaxy M21 also has a SD memory slot that supports up to 512 GB. The Galaxy M21 has a really longer battery lifetime than Samsung Galaxy J8, because it has a 71 percent larger battery capacity.
The Galaxy M21 takes way better videos and photos than Samsung Galaxy J8, because although it has a tinier diafragm aperture which is not favorable for low light photography, it also counts with a way bigger camera sensor capturing more light and vivid colors, a much higher video resolution and a back camera with lot more MP.
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