Compare phones
| Global Score | |
| 91.8 | 83.3 |
| Basic Information | |
| Samsung | Samsung |
| Android 11 | -- |
| 2021-01-29 | 2018-03-16 |
| 5.97 x 2.80 x 0.31 inches | 5.81 x 2.70 x 0.33 inches |
| 6.03 ounces | 5.75 ounces |
| Gray, Phantom pink, Violet and White | Burgundy red, Coral blue, Ice blue, Lilac purple, Midnight black, Sunrise gold and Titanium gray |
| Aluminum and Plastic | Aluminum and Glass (Corning Gorilla Glass 5) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 722.00 | $ 158.00 |
| Display / Screen | |
| 6.2 inches | 5.8 inches |
| 2400 x 1080 pixels | 2960 x 1440 pixels |
| Dynamic AMOLED | Super AMOLED |
| 424 pixels per inch | 568 pixels per inch |
| 1300 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.2 | 8.9 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 845 SDM845 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Kryo 385, 64-bit, 10 nm (Octa-Core 2800 MHz) processor |
| 8 GB RAM | 4 GB RAM |
| Adreno 660 GPU | Adreno 630 GPU |
| 9.63 | 9.54 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 400 GB) external memory slot |
| 10.1 | 11.34 |
| Camera | |
| 12.00 MP + 10.00 MP | 12.00 MP + 8.00 MP |
| f/1.80 aperture | f/1.50 aperture |
| 26.00mm focal length | -- |
| 0.57 inches (1/1.76") sensor | 0.39 inches (1/2.55") sensor |
| 7680 x 4320 (24 fps) video resolution | 3840 x 2160 (60 fps) (4K) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 10.78 | 10.23 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM |
| 10.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 3000mAh Li - Ion Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | 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, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Galaxy S21 is much better than the Galaxy S9, with a 91.8 score against 83.3. The Galaxy S21 construction is extremely newer and just a little thinner than Galaxy S9's, but it is just a little bit heavier. Samsung Galaxy S21 features a bit more vivid display than Galaxy S9, because although it has a way lower 1080 x 2400 pixels resolution and a lot lower quantity of pixels per inch in the display, it also counts with a little bit larger display.
The Samsung Galaxy S21 has a bit better processing unit than Galaxy S9, and although they both have 8 cores, the Samsung Galaxy S21 also has 4 GB more RAM memory. Galaxy S9 counts with a bigger memory capacity for applications and games than Samsung Galaxy S21, because although it has only 64 GB internal storage, it also counts with a slot for an external memory card that holds a maximum of 400 GB.
The Galaxy S21 has longer battery lifetime than Galaxy S9, because it has a 4000mAh battery size against 3000mAh. Galaxy S21 shoots just a bit better photographs and videos than Samsung Galaxy S9, because although it has a tinier diafragm aperture which is worse for low-light photography and videos, and they both have the same resolution camera, the Galaxy S21 also counts with a lot bigger sensor which provides a much higher image and video quality and a way higher 7680x4320 video resolution.
Although Samsung Galaxy S21 is a better device, it is way more expensive than Galaxy S9, and it doesn't have such a good quality/price relation as the Galaxy S9. So if you want that extra features, you can buy the Samsung Galaxy S21, otherwise you can save a couple dollars and buy the Galaxy S9, giving up some features and specs.
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