Compare phones
| Global Score | |
| 74.6 | 87.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 8.0 Oreo | Android 10 |
| -- | 2020-09-11 |
| 6.04 x 3.04 x 0.32 inches | 6.45 x 3.00 x 0.37 inches |
| 6.14 ounces | 7.51 ounces |
| 16 777 216 | Black and White |
| Plastic | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 5.5 inches | 6.7 inches |
| 1280 x 720 pixels (HD) | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED Plus |
| 267 pixels per inch | 385 pixels per inch |
| No touch screen | No touch screen |
| 7.1 | 8 |
| Performance | |
| Samsung Exynos 7 Octa 7884 chipset | Qualcomm Snapdragon 730 SM7150-AA chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor | Kryo 470, 64-bit, 8 nm (Octa-Core 2200 MHz) processor |
| 4 GB RAM | 6 GB RAM |
| ARM Mali-G71 GPU | Adreno 618 GPU |
| 8.82 | 9.27 |
| Storage | |
| 32 GB internal memory | 128 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 8.88 | 14.14 |
| Camera | |
| 13.00 MP + 8.00 MP | 64.00 MP + 32.00 MP |
| f/1.90 aperture | f/1.80 aperture |
| 27.00mm focal length | 26.00mm focal length |
| 0.33 inches (1/3.06") sensor | 0.57 inches (1/1.76") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 9.02 | 11.88 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Micro SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.1 | 6.7 |
| Battery Life | |
| 3000mAh Battery | 7000mAh Battery |
| Removable Battery | Non-Removable Battery |
| 4.96 | 8.32 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Galaxy M51 is much better than the Galaxy J7 Duo, getting a global score of 87.7 against 74.6. These phones use Android operating system, but the Galaxy M51 has 10 version while Galaxy J7 Duo has Android 8.0 Oreo. Although it's the best phone in this comparison review, the Galaxy M51 is a somewhat heavier and thicker phone than the Galaxy J7 Duo.
The Galaxy M51 counts with a much better display than Galaxy J7 Duo, because it has a better amount of pixels per inch in the display, a larger display and a much better 1080 x 2340 pixels resolution. The Galaxy M51 features a bit better processor than Galaxy J7 Duo, and although they both have 8 cores, the Galaxy M51 also has 2 GB more RAM memory.
The Samsung Galaxy M51 has a greater camera than Samsung Galaxy J7 Duo, because it has a much better 3840x2160 (4K) video definition, a larger aperture for better low light photos, a way higher 64 megapixels resolution back facing camera and a lot bigger sensor providing a much higher image quality.
The Samsung Galaxy M51 features a superior memory capacity for apps and games than Samsung Galaxy J7 Duo, because it has 128 GB internal memory and a slot for external memory cards that supports a maximum of 512 GB. Galaxy M51 counts with a superior battery lifetime than Samsung Galaxy J7 Duo, because it has a 133 percent bigger battery size.
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