| Global Score | |
| 87.4 | 87.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 5.0 | Android 10 |
| 2015-04-11 | 2020-09-11 |
| 5.65 x 2.78 x 0.27 inches | 6.45 x 3.00 x 0.37 inches |
| 4.87 ounces | 7.51 ounces |
| Black, Blue, Gold and White | Black and White |
| Aluminium and Glass | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 252.00 | -- |
| Display / Screen | |
| 5.1 inches | 6.7 inches |
| 1440 x 2560 pixels (Quad HD / 2K) | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED Plus |
| 576 pixels per inch | 385 pixels per inch |
| Capacitive, Multi-touch | No touch screen |
| 9.9 | 8 |
| Performance | |
| Exynos 7 Octa 7420 chipset | Qualcomm Snapdragon 730 SM7150-AA chipset |
| 64-bit ARM Cortex-A57 (Quad-Core 2100 MHz + Quad-Core 1500 MHz) processor | Kryo 470, 64-bit, 8 nm (Octa-Core 2200 MHz) processor |
| 3 GB (1600 MHz) RAM | 6 GB RAM |
| Mali-T760 MP8 (650 MHz) GPU | Adreno 618 GPU |
| 10.08 | 9.27 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 10.1 | 14.14 |
| Camera | |
| 16.00 MP + 5.00 MP | 64.00 MP + 32.00 MP |
| f/1.90 aperture | f/1.80 aperture |
| 28.00mm focal length | 26.00mm focal length |
| 0.38 inches (1/2.6") sensor | 0.57 inches (1/1.76") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 10.01 | 11.88 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA, HSUPA, UMTS, EDGE, GPRS and GSM | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 2550mAh Battery | 7000mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 4.56 | 8.32 |
| Other Features | |
| Bluetooth 4.1 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Galaxy M51 has an overall score of 87.7, which is a bit better than the Samsung Galaxy S6's 87.4 general score. These phones work with Android OS, but Galaxy M51 has a more recent 10 version and Samsung Galaxy S6 has Android 5.0, so it gives you a couple nice extra features and a performance increase. Even though the Galaxy M51 is extremely newer than the Samsung Galaxy S6, it is way heavier and incredibly thicker.
Galaxy S6 counts with a much better looking display than Galaxy M51, because although it has a much smaller screen, it also counts with a better 2560 x 1440 resolution and a better number of pixels per inch of screen. The Galaxy M51 counts with a much bigger storage for games and applications than Galaxy S6, and although they both have equal internal storage capacity, the Galaxy M51 also has a slot for an external memory card that allows a maximum of 512 GB.
Galaxy S6 features a bit better processing power than Galaxy M51, because although it has a lower amount of RAM memory, and they both have the same number of cores, the Galaxy S6 also counts with a 64 bits CPU and a GPU. Samsung Galaxy M51 shoots much better videos and photos than Galaxy S6, and although they both have the same video frame rate and the same 3840x2160 (4K) video definition, the Samsung Galaxy M51 also has a bigger camera aperture to capture better low light images and video, a lot better resolution back camera and a way larger back camera sensor providing a way higher image quality.
The Samsung Galaxy M51 has a superior battery lifetime than Samsung Galaxy S6, because it has 7000mAh of battery capacity.
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