Compare phones
| Global Score | |
| 73.5 | 85.5 |
| Basic Information | |
| Samsung | Samsung |
| Android 9.0 Pie, 7.0 Nougat | Android 11, 10 |
| 2017-07-01 | 2019-12-27 |
| 6.00 x 2.94 x 0.31 inches | 6.24 x 2.90 x 0.31 inches |
| 6.38 ounces | 6.07 ounces |
| Black, Gold, Rose gold and Silver | Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white |
| Aluminum | Plastic and Plastic |
| -- | Scratch-Resistant Glass |
| -- | $ 282.00 |
| 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 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 | 4 GB RAM |
| Mali-T830 MP2 GPU | Mali-G72 MP3 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 512 GB) external memory slot |
| 7.48 | 14.14 |
| 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 (240 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 | 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 | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.6 | 5.92 |
| 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 has an overall score of 85.5, which is better than Samsung Galaxy J7 (2017)'s score of 73.5. Both of these devices include Android OS (operating system), but Samsung Galaxy A51 has the older 11 version while Samsung Galaxy J7 (2017) has Android 9.0 Pie version. Samsung Galaxy A51 is a just a little lighter phone than Samsung Galaxy J7 (2017), but both are equally thin.
Samsung Galaxy A51 counts with a bit better CPU than Samsung Galaxy J7 (2017), and although they both have 8 cores, the Samsung Galaxy A51 also has 1 GB more RAM. The Samsung Galaxy A51 features a slightly better screen than Galaxy J7 (2017), because it has a bigger screen, a bit higher number of pixels per inch in the screen and a little higher 1080 x 2400px resolution.
Galaxy A51 shoots way better photos and videos than Galaxy J7 (2017), because although it has a tinier diafragm aperture, it also counts with a much better 3840x2160 video definition and a way more megapixels back facing camera. Galaxy A51 counts with a much greater storage capacity for apps and games than Galaxy J7 (2017), because it has more internal memory and an external SD slot that admits a maximum of 512 GB.
The Samsung Galaxy A51 features just a little bit longer battery duration than Galaxy J7 (2017), because it has 4000mAh of battery capacity against 3600mAh.
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