Compare phones
| Global Score | |
| 77.7 | 87.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 10 | -- |
| 2020-06-19 | 2018-08-24 |
| 6.44 x 2.96 x 0.35 inches | 6.37 x 3.01 x 0.35 inches |
| 6.77 ounces | 7.09 ounces |
| Black, Blue, Red and White | Cloud silver, Lavender purple, Midnight black and Ocean blue |
| -- | Aluminum and Glass (Corning Gorilla Glass 5) |
| -- | Scratch-Resistant Glass |
| -- | $ 457.00 |
| Display / Screen | |
| 6.5 inches | 6.4 inches |
| 1600 x 720 pixels | 2960 x 1440 pixels |
| TFT | Super AMOLED |
| 270 pixels per inch | 514 pixels per inch |
| No touch screen | No touch screen |
| 7.2 | 8.7 |
| Performance | |
| Samsung Exynos 850 chipset | Qualcomm Snapdragon 845 SDM845 chipset |
| Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor | Kryo 385, 64-bit, 10 nm (Octa-Core 2800 MHz) processor |
| 3 GB RAM | 6 GB RAM |
| Mali-G76 GPU | Adreno 630 GPU |
| 9.09 | 9.63 |
| Storage | |
| 32 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 9.84 | 14.14 |
| Camera | |
| 48.00 MP + 13.00 MP | 12.00 MP + 8.00 MP |
| f/2.00 aperture | f/1.50 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.5 inches (1/2") sensor | 0.39 inches (1/2.55") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 3840 x 2160 (60 fps) (4K) video resolution |
| -- | 1280 x 720 (960 fps) (HD) slow motion video |
| 10.78 | 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 | |
| 5000mAh Li - Polymer Battery | 4000mAh Li - Ion Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 6.8 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
Comparison review
Samsung Galaxy Note9 is much better than the Galaxy A21s, getting an 87.1 score against 77.7. Samsung Galaxy Note9's design has the same thickness than the Galaxy A21s, but it is a bit heavier. Galaxy Note9 features a much sharper screen than Galaxy A21s, because although it has a quite smaller screen, it also counts with a lot better screen pixels density and a much better resolution of 1440 x 2960 pixels.
The Galaxy Note9 has a much bigger memory capacity for applications and games than Galaxy A21s, and although they both have an external memory slot that allows a maximum of 512 GB, the Galaxy Note9 also has 96 GB more internal memory capacity. The Samsung Galaxy Note9 counts with a bit better processor than Samsung Galaxy A21s, and although they both have 8 processing cores, the Samsung Galaxy Note9 also has 3 GB more RAM memory.
Samsung Galaxy A21s counts with greater battery lifetime than Samsung Galaxy Note9, because it has a 25% bigger battery size. The Galaxy A21s shoots just a bit better photographs and videos than Galaxy Note9, because although it has worse 30 fps video frame rate and a lot tinier aperture which is not so good for low-light photos and videos, and they both have the same 1920x1080 (Full HD) video resolution, the Galaxy A21s also counts with a way larger camera sensor capturing more light and vivid colors and a much higher resolution camera.
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