Compare phones
| Global Score | |
| 86.5 | 76.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 10, 8.0 Oreo |
| 2020-03-05 | 2018-06-28 |
| 6.27 x 2.96 x 0.35 inches | 6.27 x 2.98 x 0.32 inches |
| 6.74 ounces | 6.24 ounces |
| Black, Blue and Red | Black, Blue, Gold and Pink |
| Plastic and Plastic | Plastic |
| Scratch-Resistant Glass | -- |
| Display / Screen | |
| 6.4 inches | 6 inches |
| 2340 x 1080 pixels | 1480 x 720 pixels |
| Super AMOLED | Super AMOLED |
| 403 pixels per inch | 274 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 7.2 |
| Performance | |
| Exynos 9611 chipset | Qualcomm Snapdragon 450 SDM450 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1800 MHz) processor |
| 6 GB RAM | 4 GB RAM |
| Mali-G72 MP3 GPU | Adreno 506 GPU |
| 9.36 | 8.91 |
| 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 | |
| 64.00 MP + 32.00 MP | 16.00 MP + 16.00 MP |
| f/1.80 aperture | f/1.70 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.59 inches (1/1.7") sensor | 0.36 inches (1/2.8") 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 | -- |
| 12.1 | 9.46 |
| 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 | 3500mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 5.44 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 4.2 |
| GPS | GPS |
| NFC | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Galaxy M31 has a global score of 86.5, which is better than the Galaxy J8's 76.7 score. Galaxy M31's construction is newer, but a little thicker and just a little bit heavier than Galaxy J8. Both phones in this comparison have Android OS, but Galaxy M31 has a newer 11 version while Galaxy J8 has Android 10, so it gives lots of additional features.
The Samsung Galaxy M31 features a little faster processor than Galaxy J8, and although they both have the same number of cores, the Samsung Galaxy M31 also has 2 GB more RAM memory. Samsung Galaxy M31 features a much better looking display than Samsung Galaxy J8, because it has a way higher resolution of 1080 x 2340 pixels, more pixels per inch of screen and a little bigger screen.
The Galaxy M31 shoots greater pictures and videos than Galaxy J8, because although it has a smaller diafragm aperture, it also counts with a lot larger camera sensor providing a way better image quality, a lot better 64 mega-pixels resolution back-facing camera and a much better 3840x2160 video resolution.
The Galaxy M31 has slightly more storage capacity for games and applications than Galaxy J8, and although they both have equal internal storage capacity, the Galaxy M31 also has an external memory card slot that supports up to 512 GB. Galaxy M31 features a very superior battery life than Galaxy J8, because it has 6000mAh of battery capacity against 3500mAh.
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