Compare phones
| Global Score | |
| 73.5 | 86.5 |
| Basic Information | |
| Samsung | Samsung |
| Android 9.0 Pie, 7.0 Nougat | Android 11, 10 |
| 2017-07-01 | 2020-03-05 |
| 6.00 x 2.94 x 0.31 inches | 6.27 x 2.96 x 0.35 inches |
| 6.38 ounces | 6.74 ounces |
| Black, Gold, Rose gold and Silver | Black, Blue and Red |
| Aluminum | Plastic and Plastic |
| -- | Scratch-Resistant Glass |
| Display / Screen | |
| 5.5 inches | 6.4 inches |
| 1920 x 1080 pixels (Full HD) | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 401 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.9 | 8.4 |
| Performance | |
| Samsung Exynos 7 Octa 7870 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 |
| 3 GB RAM | 6 GB RAM |
| Mali-T830 MP2 GPU | Mali-G72 MP3 GPU |
| 8.73 | 9.36 |
| Storage | |
| 16 GB internal memory | 64 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 7.48 | 11.74 |
| Camera | |
| 13.00 MP + 13.00 MP | 64.00 MP + 32.00 MP |
| f/1.70 aperture | f/1.80 aperture |
| -- | 26.00mm focal length |
| -- | 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 |
| 9.02 | 12.1 |
| 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+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 3600mAh Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.6 | 7.52 |
| Other Features | |
| Bluetooth 4.1 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Galaxy M31 has a score of 86.5, which is much better than Galaxy J7 (2017)'s overall score of 73.5. Both phones we compare here come with Android OS (Operating System), but Galaxy M31 has an older 11 version while Galaxy J7 (2017) has Android 9.0 Pie. Although Galaxy M31 is noticeably newer than Galaxy J7 (2017), it is just a little bit heavier and thicker.
The Galaxy M31 counts with a little sharper screen than Galaxy J7 (2017), because it has a quite better 1080 x 2340 pixels resolution, a bigger display and a little greater screen density. The Samsung Galaxy M31 counts with a much bigger memory for games and applications than Samsung Galaxy J7 (2017), because it has 48 GB more internal storage and an external memory slot that admits up to 512 GB.
The Samsung Galaxy M31 has a little bit better processing power than Galaxy J7 (2017), and although they both have the same number of cores, the Samsung Galaxy M31 also has more RAM memory. Galaxy M31 captures much clearer photos and videos than Samsung Galaxy J7 (2017), because although it has a tinier diafragm aperture which is not recommended for shooting pictures or videos in poorly lited environments, it also counts with a way higher 3840x2160 video definition and a much more MP back facing camera.
The Galaxy M31 features a superior battery life than Galaxy J7 (2017), because it has 6000mAh of battery capacity.
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