Compare phones
| Global Score | |
| 72.7 | 86.5 |
| Basic Information | |
| Samsung | Samsung |
| Android 8.0 Oreo | Android 11, 10 |
| 2018-06-29 | 2020-03-05 |
| 6.03 x 3.00 x 0.34 inches | 6.27 x 2.96 x 0.35 inches |
| 6.38 ounces | 6.74 ounces |
| 16 777 216 | Black, Blue and Red |
| -- | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 5.5 inches | 6.4 inches |
| 1280 x 720 pixels (HD) | 2340 x 1080 pixels |
| TFT | Super AMOLED |
| 267 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.1 | 8.4 |
| Performance | |
| Samsung Exynos 7 Octa 7884 chipset | Exynos 9611 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 2 GB RAM | 6 GB RAM |
| Mali-T830 MP1 GPU | Mali-G72 MP3 GPU |
| 8.73 | 9.36 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| microSDXC (up to 400 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 9.44 | 11.74 |
| Camera | |
| 13.00 MP + 13.00 MP | 64.00 MP + 32.00 MP |
| f/1.70 aperture | f/1.80 aperture |
| 28.00mm focal length | 26.00mm focal length |
| 0.33 inches (1/3.06") sensor | 0.59 inches (1/1.7") 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 | 12.1 |
| 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 | Nano SIM, Dual SIM |
| 6.3 | 6.7 |
| Battery Life | |
| 3300mAh Li - Polymer Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.28 | 7.52 |
| Other Features | |
| Bluetooth 4.2 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| -- | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
The Galaxy M31 is much better than the Samsung Galaxy J7 Refine, getting a global score of 86.5 against 72.7. Galaxy M31's body is newer than the Samsung Galaxy J7 Refine's, but it is just a little heavier and a little thicker. Both devices we are comparing work with Android OS, but Galaxy M31 has an older 11 version and Samsung Galaxy J7 Refine has Android 8.0 Oreo version.
The Galaxy M31 features a more vivid screen than Galaxy J7 Refine, because it has a larger screen, a way higher 1080 x 2340 resolution and a much higher count of pixels per inch of screen. The Samsung Galaxy M31 features a superior storage capacity to install games and applications than Galaxy J7 Refine, because it has more internal storage capacity and a SD memory card expansion slot that allows up to 512 GB.
Galaxy M31 has a bit better hardware performance than Samsung Galaxy J7 Refine, and although they both have a Octa-Core CPU, the Galaxy M31 also has a greater amount of RAM memory. The Galaxy M31 has a superior battery lifetime than Samsung Galaxy J7 Refine, because it has a 6000mAh battery size against 3300mAh.
Galaxy M31 counts with a much better camera than Samsung Galaxy J7 Refine, because although it has a tinier aperture which is not favorable for capturing pictures and videos in poorly lited situations, it also counts with a camera in the back with a much better 64 mega pixels resolution, a much larger back camera sensor which provides a much better photo and video quality and a lot better (4K) video definition.
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