Compare phones
| Global Score | |
| 76.1 | 79 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 10 | Android 11, 10 |
| 2020-06-29 | 2020-04-07 |
| 6.61 x 3.02 x 0.32 inches | 6.53 x 3.02 x 0.35 inches |
| 6.81 ounces | 7.37 ounces |
| Black | Aurora blue, Glacier white and Interstellar grey |
| Plastic and Plastic | Glass (Corning Gorilla Glass 5) |
| -- | Scratch-Resistant Glass |
| $ 194.00 | $ 249.00 |
| Display / Screen | |
| 6.5 inches | 6.7 inches |
| 1600 x 720 pixels | 2400 x 1080 pixels |
| IPS LCD | IPS LCD |
| 270 pixels per inch | 393 pixels per inch |
| No touch screen | No touch screen |
| 7.3 | 8 |
| Performance | |
| Mediatek Helio P35 chipset | Qualcomm Snapdragon 720G SM7125 chipset |
| Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor | Kryo 465, 64-bit, 8 nm (Octa-Core 2300 MHz) processor |
| 3 GB RAM | 4 GB RAM |
| PowerVR GE8320 GPU | Adreno 618 GPU |
| 9.27 | 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 | |
| 16.00 MP + 13.00 MP | 48.00 MP + 16.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 0.33 inches (1/3.06") 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 |
| 9.35 | 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 | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 5020mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 6.8 |
| 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
The Xiaomi Redmi Note 9S is slightly better than Galaxy A21, getting a score of 79 against 76.1. These devices include Android operating system, but Xiaomi Redmi Note 9S has newer 11 version while Galaxy A21 has Android 10 version, so it provides some nice extra features. Even though Xiaomi Redmi Note 9S is a better cellphone than Galaxy A21, it must be told that it's also a just a bit heavier and a little thicker cellphone.
The Xiaomi Redmi Note 9S has a little bit better display than Samsung Galaxy A21, because it has more pixels per screen inch, a much higher resolution of 1080 x 2400 pixels and a little larger display. 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 an external memory slot that supports a maximum of 512 GB, the Xiaomi Redmi Note 9S also has more internal storage.
Xiaomi Redmi Note 9S's CPU is very similar to Samsung Galaxy A21's CPU, and although the Xiaomi Redmi Note 9S has a larger amount of RAM, they both have the same number of cores. Xiaomi Redmi Note 9S counts with a much better camera than Samsung Galaxy A21, and although they both have a F1.8 camera aperture, the Xiaomi Redmi Note 9S also has a much higher (4K) video definition, a much larger camera sensor capturing more light and vivid colors and a much higher resolution camera in the back.
The Xiaomi Redmi Note 9S features improved battery performance than Galaxy A21, because it has 5020mAh of battery capacity.
Although Xiaomi Redmi Note 9S is a better device, it is more expensive than Galaxy A21, and it doesn't have such a good quality/price relation as the Galaxy A21. So if you need that extra features and specs, you can buy the Xiaomi Redmi Note 9S, otherwise you can save a couple dollars and buy the Galaxy A21, giving up some features and specifications.
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