Compare phones
| Global Score | |
| 77.7 | 79 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 10 | Android 11, 10 |
| 2020-06-19 | 2020-04-07 |
| 6.44 x 2.96 x 0.35 inches | 6.53 x 3.02 x 0.35 inches |
| 6.77 ounces | 7.37 ounces |
| Black, Blue, Red and White | Aurora blue, Glacier white and Interstellar grey |
| -- | Glass (Corning Gorilla Glass 5) |
| -- | Scratch-Resistant Glass |
| -- | $ 249.00 |
| Display / Screen | |
| 6.5 inches | 6.7 inches |
| 1600 x 720 pixels | 2400 x 1080 pixels |
| TFT | IPS LCD |
| 270 pixels per inch | 393 pixels per inch |
| No touch screen | No touch screen |
| 7.2 | 8 |
| Performance | |
| Samsung Exynos 850 chipset | Qualcomm Snapdragon 720G SM7125 chipset |
| Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor | Kryo 465, 64-bit, 8 nm (Octa-Core 2300 MHz) processor |
| 3 GB RAM | 4 GB RAM |
| Mali-G76 GPU | Adreno 618 GPU |
| 9.09 | 9.27 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 9.84 | 11.74 |
| Camera | |
| 48.00 MP + 13.00 MP | 48.00 MP + 16.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | 0.5 inches (1/2") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| -- | 1280 x 720 (960 fps) (HD) slow motion video |
| 10.78 | 11.55 |
| 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, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 5020mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6.8 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| -- | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
Comparison review
Xiaomi Redmi Note 9S is a little bit better than Samsung Galaxy A21s, with a 79 score against 77.7. Xiaomi Redmi Note 9S's design has the same thickness than the Samsung Galaxy A21s, but it is a bit heavier. Both devices we are comparing use Android OS (Operating System), but Xiaomi Redmi Note 9S has a more recent 11 version and Samsung Galaxy A21s has Android 10 version, providing some nice extra features and performance optimizations.
The Xiaomi Redmi Note 9S counts with a bit superior processor than Samsung Galaxy A21s, and although they both have 8 cores, the Xiaomi Redmi Note 9S also has a higher amount of RAM. Xiaomi Redmi Note 9S has a more vivid display than Samsung Galaxy A21s, because it has more pixels per inch of screen, a lot better resolution of 1080 x 2400px and a little bigger display.
Xiaomi Redmi Note 9S counts with a better storage capacity to store more apps and games than Galaxy A21s, and although they both have an external SD slot that admits a maximum of 512 GB, the Xiaomi Redmi Note 9S also has 64 GB internal memory. The Xiaomi Redmi Note 9S features a battery life that's very similar to the Samsung Galaxy A21s one, although the Xiaomi Redmi Note 9S also has a 0% larger battery capacity.
The Xiaomi Redmi Note 9S has a slightly better camera than Galaxy A21s, and although they both have a same resolution back-facing camera and the same camera sensor size, the Xiaomi Redmi Note 9S also has a bigger camera aperture for better photos and video in poorly lited environments and a much higher 3840x2160 video quality.
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