Compare phones
| Global Score | |
| 73.5 | 81.3 |
| Basic Information | |
| Samsung | Samsung |
| Android 9.0 Pie, 7.0 Nougat | Android 10 |
| 2017-07-01 | 2020-04-27 |
| 6.00 x 2.94 x 0.31 inches | 6.27 x 2.88 x 0.34 inches |
| 6.38 ounces | 6.53 ounces |
| Black, Gold, Rose gold and Silver | Prism Crush black, Prism Crush blue, Prism Crush red and Prism Crush white |
| Aluminum | Plastic |
| Display / Screen | |
| 5.5 inches | 6.4 inches |
| 1920 x 1080 pixels (Full HD) | 2400 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 401 pixels per inch | 411 pixels per inch |
| No touch screen | No touch screen |
| 7.9 | 8.1 |
| Performance | |
| Samsung Exynos 7 Octa 7870 chipset | MediaTek Helio P65 MT6768 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor | Arm Cortex-A75 and Arm Cortex-A55, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 3 GB RAM | 4 GB RAM |
| Mali-T830 MP2 GPU | Mali-G52 MC2 GPU |
| 8.73 | 9.09 |
| 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 | 48.00 MP + 20.00 MP |
| f/1.70 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| -- | 0.5 inches (1/2") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 9.02 | 10.89 |
| 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 | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.6 | 6.8 |
| 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 | -- |
Comparison review
The Galaxy A31 is better than Galaxy J7 (2017), having an 81.3 score against 73.5. These phones use Android OS (operating system), but the Galaxy A31 has 10 version while Galaxy J7 (2017) has Android 9.0 Pie version. The Galaxy A31 body is noticeably newer, but just a bit heavier and a bit thicker than the Galaxy J7 (2017).
The Galaxy A31 counts with a little sharper display than Samsung Galaxy J7 (2017), because it has a larger screen, a slightly better resolution of 1080 x 2400 and a little more pixels per inch of display. Galaxy A31 features a much bigger memory to install applications and games or saving photos and videos than Galaxy J7 (2017), because it has 48 GB more internal memory capacity and a SD memory card expansion slot that holds up to 512 GB.
The Samsung Galaxy A31 counts with a little faster CPU than Samsung Galaxy J7 (2017), and although they both have 8 CPU cores, the Samsung Galaxy A31 also has a larger amount of RAM. The Galaxy A31 has a very superior battery duration than Galaxy J7 (2017), because it has a 5000mAh battery capacity instead of 3600mAh.
Samsung Galaxy A31 takes way better videos and photos than Galaxy J7 (2017), because although it has a tinier aperture, and they both have the same (Full HD) video quality and the same 30 fps video frame rate, the Samsung Galaxy A31 also counts with a lot more megapixels back-facing camera.
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