Compare phones
| Global Score | |
| 85.5 | 83.3 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | -- |
| 2019-12-27 | 2018-03-16 |
| 6.24 x 2.90 x 0.31 inches | 5.81 x 2.70 x 0.33 inches |
| 6.07 ounces | 5.75 ounces |
| Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white | Burgundy red, Coral blue, Ice blue, Lilac purple, Midnight black, Sunrise gold and Titanium gray |
| Plastic and Plastic | Aluminum and Glass (Corning Gorilla Glass 5) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 282.00 | $ 158.00 |
| Display / Screen | |
| 6.5 inches | 5.8 inches |
| 2400 x 1080 pixels | 2960 x 1440 pixels |
| Super AMOLED | Super AMOLED |
| 405 pixels per inch | 568 pixels per inch |
| No touch screen | No touch screen |
| 8.1 | 8.9 |
| Performance | |
| Samsung Exynos 9611 chipset | Qualcomm Snapdragon 845 SDM845 chipset |
| ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Kryo 385, 64-bit, 10 nm (Octa-Core 2800 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Mali-G72 MP3 GPU | Adreno 630 GPU |
| 9.27 | 9.54 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 400 GB) external memory slot |
| 14.14 | 11.34 |
| Camera | |
| 48.00 MP + 32.00 MP | 12.00 MP + 8.00 MP |
| f/2.00 aperture | f/1.50 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | 0.39 inches (1/2.55") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (60 fps) (4K) video resolution |
| 1280 x 720 (240 fps) (HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 11.55 | 10.23 |
| 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 |
| 6.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 3000mAh Li - Ion Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 5.92 | 4.96 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| 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 | FM Radio |
Comparison review
Galaxy A51 has a general score of 85.5, which is a bit better than the Galaxy S9's 83.3 overall score. The Galaxy A51 body is newer and a bit thinner, but also a little heavier than the Galaxy S9. Galaxy S9 features a bit more vivid display than Galaxy A51, because although it has a bit smaller screen, it also counts with a greater pixel count in each inch of screen and a higher resolution of 1440 x 2960px.
The Galaxy A51 features a much better storage capacity to store more apps and games than Galaxy S9, because it has more internal memory capacity and a SD card slot that allows up to 512 GB. The Galaxy S9 counts with a bit better performance than Galaxy A51. They have the same RAM amount and 8 cpu cores.
The Galaxy A51 counts with a better camera than Galaxy S9, because although it has slower video frame rate and a way tinier aperture which is not good for low-light captures and video, and they both have the same 3840x2160 (4K) video quality, the Galaxy A51 also counts with a lot higher resolution camera in the back and a much bigger back-facing camera sensor taking more light and vivid colors.
The Samsung Galaxy A51 features improved battery lifetime than Galaxy S9, because it has a 4000mAh battery size.
Although Samsung Galaxy A51 is a better device, it costs a lot more money than the Samsung Galaxy S9, and it doesn't have such a good quality/price relation as Samsung Galaxy S9. So if you want that extra features and specs, you can buy the Samsung Galaxy A51, else you can save some money and get the Samsung Galaxy S9, giving up a couple features and specifications.
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