Compare phones
| Global Score | |
| 91.8 | 85.2 |
| Basic Information | |
| Samsung | Samsung |
| Android 11 | -- |
| 2021-01-29 | 2018-11-15 |
| 5.97 x 2.80 x 0.31 inches | 6.40 x 3.03 x 0.31 inches |
| 6.03 ounces | 6.46 ounces |
| Gray, Phantom pink, Violet and White | Bubblegum pink, Caviar black and Lemonade blue |
| Aluminum and Plastic | Glass and Metal |
| Scratch-Resistant Glass | -- |
| $ 722.00 | -- |
| Display / Screen | |
| 6.2 inches | 6.3 inches |
| 2400 x 1080 pixels | 2220 x 1080 pixels |
| Dynamic AMOLED | Super AMOLED |
| 424 pixels per inch | 392 pixels per inch |
| 1300 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.2 | 8 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 660 SDM660 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Kryo 260, 64-bit, 14 nm (Octa-Core 2200 MHz) processor |
| 8 GB RAM | 6 GB RAM |
| Adreno 660 GPU | Adreno 512 GPU |
| 9.63 | 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 | |
| 12.00 MP + 10.00 MP | 24.00 MP + 24.00 MP |
| f/1.80 aperture | f/1.70 aperture |
| 26.00mm focal length | 27.00mm focal length |
| 0.57 inches (1/1.76") sensor | 0.36 inches (1/2.8") sensor |
| 7680 x 4320 (24 fps) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | -- |
| 10.78 | 10.45 |
| 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, Dual SIM |
| 10.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 3800mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 5.92 | 5.76 |
| 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, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Samsung Galaxy S21 has an overall score of 91.8, which is slightly better than the Galaxy A9 (2018)'s score of 85.2. Samsung Galaxy S21's construction has the same thickness than Galaxy A9 (2018), but it is a bit lighter. The Galaxy S21 features just a little better processing power than Samsung Galaxy A9 (2018), and although they both have 8 processing cores, the Galaxy S21 also has more RAM memory.
Galaxy S21 features a more vivid screen than Galaxy A9 (2018), because although it has a little smaller screen, it also counts with a just a little more pixels per inch in the screen and a quite better 1080 x 2400px resolution. Samsung Galaxy S21 has a slightly better camera than Samsung Galaxy A9 (2018), because although it has a tinier aperture which is not favorable for taking photographs or video in poorly lited environments and a back facing camera with a lot worse resolution, it also counts with a way bigger back-facing camera sensor capturing more light and vivid colors and a lot higher video definition.
The Galaxy A9 (2018) has a much bigger storage for games and applications than Galaxy S21, and although they both have exactly the same internal memory capacity, the Galaxy A9 (2018) also has a SD extension slot that admits a maximum of 512 GB. The Galaxy S21 features a bit better battery life than Galaxy A9 (2018), because it has a 5 percent larger battery capacity.
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