Compare phones
| Global Score | |
| 73.5 | 90.8 |
| Basic Information | |
| Samsung | Samsung |
| Android 9.0 Pie, 7.0 Nougat | Android 11, 10 |
| 2017-07-01 | 2020-04-29 |
| 6.00 x 2.94 x 0.31 inches | 6.26 x 2.90 x 0.34 inches |
| 6.38 ounces | 6.60 ounces |
| Black, Gold, Rose gold and Silver | Prism cube black |
| Aluminum | Aluminum and Plastic |
| -- | Scratch-Resistant Glass |
| -- | $ 339.00 |
| Display / Screen | |
| 5.5 inches | 6.5 inches |
| 1920 x 1080 pixels (Full HD) | 2400 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 401 pixels per inch | 405 pixels per inch |
| No touch screen | No touch screen |
| 7.9 | 8.1 |
| Performance | |
| Samsung Exynos 7 Octa 7870 chipset | Samsung Exynos 980 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor | ARM Cortex-A77 and ARM Cortex-A55, 64-bit, 8 nm (Octa-Core 2200 MHz) processor |
| 3 GB RAM | 6 GB RAM |
| Mali-T830 MP2 GPU | Mali-G76 MP5 GPU |
| 8.73 | 9.27 |
| Storage | |
| 16 GB internal memory | 128 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 1000 GB) external memory slot |
| 7.48 | 15.38 |
| Camera | |
| 13.00 MP + 13.00 MP | 48.00 MP + 32.00 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 | 3840 x 2160 (30 fps) (4K) video resolution |
| -- | 1280 x 720 (480 fps) (HD) slow motion video |
| 9.02 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.7 | 10.7 |
| Battery Life | |
| 3600mAh Battery | 4500mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.6 | 6.32 |
| 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 Samsung Galaxy A51 5G has a general score of 90.8, which is much better than Samsung Galaxy J7 (2017)'s score of 73.5. Samsung Galaxy A51 5G's construction is noticeably newer than Samsung Galaxy J7 (2017)'s, but it's a little thicker and just a bit heavier. Both of these phones work with Android operating system, but Samsung Galaxy A51 5G has an older 11 version and Samsung Galaxy J7 (2017) has Android 9.0 Pie version.
Galaxy A51 5G counts with a little faster CPU than Samsung Galaxy J7 (2017), and although they both have a Octa-Core processor, the Galaxy A51 5G also has more RAM memory. Galaxy A51 5G counts with a little sharper screen than Galaxy J7 (2017), because it has a quite better pixel count per inch in the screen, a larger display and a little higher 1080 x 2400px resolution.
Samsung Galaxy A51 5G features a superior memory for applications, games, photos and videos than Samsung Galaxy J7 (2017), because it has a SD memory card expansion slot that supports up to 1000 GB and 112 GB more internal memory capacity. Samsung Galaxy A51 5G takes a lot better photos and videos than Samsung Galaxy J7 (2017), because although it has a tinier camera aperture which is not so good for shooting photos in low light environments, it also counts with a back-facing camera with lot more mega-pixels and a much better video quality.
The Samsung Galaxy A51 5G features longer battery duration than Galaxy J7 (2017), because it has a 4500mAh battery capacity against 3600mAh.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.