Compare phones
| Global Score | |
| 85.2 | 81.3 |
| Basic Information | |
| Samsung | Samsung |
| -- | Android 10 |
| 2018-11-15 | 2020-04-27 |
| 6.40 x 3.03 x 0.31 inches | 6.27 x 2.88 x 0.34 inches |
| 6.46 ounces | 6.53 ounces |
| Bubblegum pink, Caviar black and Lemonade blue | Prism Crush black, Prism Crush blue, Prism Crush red and Prism Crush white |
| Glass and Metal | Plastic |
| Display / Screen | |
| 6.3 inches | 6.4 inches |
| 2220 x 1080 pixels | 2400 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 392 pixels per inch | 411 pixels per inch |
| No touch screen | No touch screen |
| 8 | 8.1 |
| Performance | |
| Qualcomm Snapdragon 660 SDM660 chipset | MediaTek Helio P65 MT6768 chipset |
| Kryo 260, 64-bit, 14 nm (Octa-Core 2200 MHz) processor | Arm Cortex-A75 and Arm Cortex-A55, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 6 GB RAM | 4 GB RAM |
| Adreno 512 GPU | Mali-G52 MC2 GPU |
| 9.27 | 9.09 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 14.14 | 11.74 |
| Camera | |
| 24.00 MP + 24.00 MP | 48.00 MP + 20.00 MP |
| f/1.70 aperture | f/2.00 aperture |
| 27.00mm focal length | 26.00mm focal length |
| 0.36 inches (1/2.8") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 10.45 | 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 | |
| 3800mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.76 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | 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 A9 (2018) is just a bit better than Galaxy A31, having a global score of 85.2 against 81.3. Despite of the fact that Galaxy A9 (2018) is older than the Galaxy A31, it's construction is just a little lighter and a little bit thinner. The Galaxy A9 (2018) features a bit faster CPU than Samsung Galaxy A31, and although they both have a Octa-Core CPU, the Galaxy A9 (2018) also has a larger amount of RAM memory.
Samsung Galaxy A31 counts with just a bit better screen than Galaxy A9 (2018), because it has a little better screen density, a quite larger screen and a slightly better resolution of 1080 x 2400px. The Samsung Galaxy A31 features a slightly better camera than Samsung Galaxy A9 (2018), because although it has a tinier aperture which is worse for low-light captures, and they both have the same video quality and the same 30 frames per second video frame rates, the Samsung Galaxy A31 also counts with a lot larger sensor shooting much better quality videos and photos and a lot more megapixels back-facing camera.
The Samsung Galaxy A9 (2018) has a much better storage to store more apps and games than Samsung Galaxy A31, and although they both have a slot for external memory cards that holds up to 512 GB, the Samsung Galaxy A9 (2018) also has 128 GB internal memory. Galaxy A31 features better battery lifetime than Galaxy A9 (2018), because it has a 5000mAh battery capacity instead of 3800mAh.
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