Compare phones
| Global Score | |
| 79 | 76.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 11, 10 | Android 10 |
| 2020-04-07 | 2020-06-29 |
| 6.53 x 3.02 x 0.35 inches | 6.61 x 3.02 x 0.32 inches |
| 7.37 ounces | 6.81 ounces |
| Aurora blue, Glacier white and Interstellar grey | Black |
| Glass (Corning Gorilla Glass 5) | Plastic and Plastic |
| Scratch-Resistant Glass | -- |
| $ 249.00 | $ 194.00 |
| Display / Screen | |
| 6.7 inches | 6.5 inches |
| 2400 x 1080 pixels | 1600 x 720 pixels |
| IPS LCD | IPS LCD |
| 393 pixels per inch | 270 pixels per inch |
| No touch screen | No touch screen |
| 8 | 7.3 |
| Performance | |
| Qualcomm Snapdragon 720G SM7125 chipset | Mediatek Helio P35 chipset |
| Kryo 465, 64-bit, 8 nm (Octa-Core 2300 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor |
| 4 GB RAM | 3 GB RAM |
| Adreno 618 GPU | PowerVR GE8320 GPU |
| 9.27 | 9.27 |
| Storage | |
| 64 GB internal memory | 32 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 11.74 | 9.84 |
| Camera | |
| 48.00 MP + 16.00 MP | 16.00 MP + 13.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 0.5 inches (1/2") sensor | 0.33 inches (1/3.06") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | -- |
| 11.55 | 9.35 |
| 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 | |
| 5020mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6.8 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
Xiaomi Redmi Note 9S has a score of 79, which is a little bit better than the Galaxy A21's overall score of 76.1. These devices use Android OS (operating system), but Xiaomi Redmi Note 9S has a more recent 11 version while Galaxy A21 has Android 10 version, so it provides the user a couple additional features. Xiaomi Redmi Note 9S's construction is just a little thicker and just a little heavier than Galaxy A21.
The Galaxy A21's processor is just as good as the processor in Xiaomi Redmi Note 9S, and although the Galaxy A21 has less RAM memory, they both have a Octa-Core processor. The Xiaomi Redmi Note 9S counts with a slightly better display than Galaxy A21, because it has a better screen pixel density, a much better 1080 x 2400 resolution and a bit bigger screen.
The Xiaomi Redmi Note 9S features a greater storage capacity for applications, games, photos and videos than Samsung Galaxy A21, and although they both have a slot for external memory cards that admits a maximum of 512 GB, the Xiaomi Redmi Note 9S also has 64 GB internal storage. The Xiaomi Redmi Note 9S counts with greater battery duration than Samsung Galaxy A21, because it has a 5020mAh battery capacity instead of 4000mAh.
Xiaomi Redmi Note 9S shoots a lot better photographs and videos than Samsung Galaxy A21, and although they both have a same size diafragm aperture, the Xiaomi Redmi Note 9S also has a much more megapixels back camera, a much bigger sensor providing a much better image quality and a way higher (4K) video resolution.
Although Xiaomi Redmi Note 9S is a better device, it is more expensive than Galaxy A21, and it doesn't have such a good price and quality relation as Galaxy A21. So if you need that extra specs, you can buy the Xiaomi Redmi Note 9S, otherwise you can save some dollars and buy the Galaxy A21, resigning some features and specs.
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