| Global Score | |
| 85.5 | 87.4 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 5.0 |
| 2019-12-27 | 2015-04-11 |
| 6.24 x 2.90 x 0.31 inches | 5.65 x 2.78 x 0.27 inches |
| 6.07 ounces | 4.87 ounces |
| Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white | Black, Blue, Gold and White |
| Plastic and Plastic | Aluminium and Glass |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 282.00 | $ 252.00 |
| Display / Screen | |
| 6.5 inches | 5.1 inches |
| 2400 x 1080 pixels | 1440 x 2560 pixels (Quad HD / 2K) |
| Super AMOLED | Super AMOLED |
| 405 pixels per inch | 576 pixels per inch |
| No touch screen | Capacitive, Multi-touch |
| 8.1 | 9.9 |
| Performance | |
| Samsung Exynos 9611 chipset | Exynos 7 Octa 7420 chipset |
| ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | 64-bit ARM Cortex-A57 (Quad-Core 2100 MHz + Quad-Core 1500 MHz) processor |
| 4 GB RAM | 3 GB (1600 MHz) RAM |
| Mali-G72 MP3 GPU | Mali-T760 MP8 (650 MHz) GPU |
| 9.27 | 10.08 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 14.14 | 10.1 |
| Camera | |
| 48.00 MP + 32.00 MP | 16.00 MP + 5.00 MP |
| f/2.00 aperture | f/1.90 aperture |
| 26.00mm focal length | 28.00mm focal length |
| 0.5 inches (1/2") sensor | 0.38 inches (1/2.6") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (240 fps) (HD) slow motion video | -- |
| 11.55 | 10.01 |
| 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, HSUPA, UMTS, EDGE, GPRS and GSM |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 2550mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 5.92 | 4.56 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 4.1 |
| GPS | GPS |
| NFC | NFC |
| -- | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
The Galaxy S6 has a global score of 87.4, which is just a bit better than Samsung Galaxy A51's global score of 85.5. These phones come with Android OS (Operating System), but Galaxy S6 has the previous 5.0 version and Samsung Galaxy A51 has Android 11 version. Despite of the fact that Galaxy S6 is much older than the Samsung Galaxy A51, it's design is somewhat thinner and somewhat lighter.
The Galaxy S6 has a bit better processing power than Samsung Galaxy A51, because although it has 1 GB lesser RAM, and they both have 8 cpu cores, the Galaxy S6 also counts with an extra graphics co-processor and a 64-bits CPU. Galaxy S6 has a much more vibrant display than Samsung Galaxy A51, because although it has a really smaller display, it also counts with a better pixel quantity in each inch of display and a higher resolution of 2560 x 1440.
Samsung Galaxy A51 features a much better camera than Samsung Galaxy S6, because although it has a tinier diafragm aperture, and they both have the same video frame rates and the same 3840x2160 video quality, the Samsung Galaxy A51 also counts with a much larger camera sensor shooting way higher quality photos and a way better resolution camera.
The Galaxy A51 has a much bigger storage for games and applications than Samsung Galaxy S6, and although they both have equal 128 GB internal memory, the Galaxy A51 also has a SD memory slot that holds a maximum of 512 GB. Galaxy A51 counts with a very superior battery duration than Galaxy S6, because it has 4000mAh of battery capacity against 2550mAh.
Despite of being the best phone in this comparison, Samsung Galaxy S6 is also the cheapest.
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