Xiaomi Redmi Note 9S vs Samsung Galaxy A51
46
out of 100
VS
38
out of 100
Here we compared two mid-range smartphones: the 6.67-inch Xiaomi Redmi Note 9S (with Qualcomm Snapdragon 720G) that was released on March 23, 2020, against the Samsung Galaxy A51, which is powered by Exynos 9 Octa 9611 and came out 3 months before. On this page, you will find tests, full specs, strengths, and weaknesses of each of the devices.
Select the amount of RAM to evaluate performance and value for money more precisely
Key differences
Reasons to consider the Xiaomi Redmi Note 9S
- Shows 51% longer battery life (26:58 vs 17:53 hours)
- Comes with 1020 mAh larger battery capacity: 5020 vs 4000 mAh
- 46% better performance in AnTuTu Benchmark (515K versus 352K)
- Faster storage type - UFS 2.1 versus UFS 2.0
- More energy-efficient CPU β Snapdragon 720G
- 2x faster in single-core GeekBench 6 test: 751 and 372 points
- Has a built-in infrared port
Reasons to consider the Samsung Galaxy A51
- Delivers 10% higher peak brightness (636 against 576 nits)
- More recent OS version: Android 13 versus 12
- Super AMOLED display (versus competitor's IPS LCD)
- Supports Dolby Atmos sound technology
- Weighs 38 grams less
- The front-facing camera can record video at 4K
Review
Display
Screen quality, color accuracy, brightness
Camera
Photo and video recording quality
Performance
CPU and memory performance (apps, system)
Gaming
Capabilities for playing modern games
Battery
Battery life, charging type and speed
Connectivity
Networks, ports, data transmission
Scores with a red asterisk (*) are approximate and may change in the future as we gather more data.
Select your primary usage scenario to get a more accurate NanoReview Score
Value for money (Beta)
Tests and specifications
Comparison table of technical specifications and testsDisplay
| Type | IPS LCD | Super AMOLED |
| Size | 6.67 inches | 6.5 inches |
| Resolution | 1080 x 2400 pixels | 1080 x 2400 pixels |
| Aspect ratio | 20:9 | 20:9 |
| PPI | 395 ppi | 405 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Adaptive refresh rate | No | No |
| Max rated brightness | 628 nits | 400 nits |
| HDR support | Yes, HDR10 | No |
| Screen protection | Corning Gorilla Glass 5 | Corning Gorilla Glass 3 |
| Screen-to-body ratio | 84% | 87.5% |
| Display features | - | - Always-On Display |
| RGB color space | 114.9% | 98.8% |
| PWM | Not detected | 242 Hz |
| Response time | 34 ms | 25 ms |
| Contrast | 1111:1 | β Infinity |
Peak brightness test (auto)
Design and build
| Height | 166 mm (6.54 inches) | 158.5 mm (6.24 inches) |
| Width | 77 mm (3.03 inches) | 73.6 mm (2.9 inches) |
| Thickness | 8.8 mm (0.35 inches) | 7.9 mm (0.31 inches) |
| Weight | 210 g (7.41 oz) | 172 g (6.07 oz) |
| Waterproof | No | No |
| Rear material | Glass | Plastic |
| Frame material | Plastic | Plastic |
| Colors | White, Black, Blue | White, Black |
| Fingerprint scanner | Yes, in-button | Yes, in-display |
Screen-to-body ratio
Performance
| Chipset | Qualcomm Snapdragon 720G | Samsung Exynos 9 Octa 9611 |
| Max clock | 2300 MHz | 2300 MHz |
| CPU cores | 8 (2 + 6) | 8 (4 + 4) |
| Architecture | - 6 cores at 1.8 GHz: Kryo 465 Silver (Cortex-A55) - 2 cores at 2.3 GHz: Kryo 465 Gold (Cortex-A76) |
- 4 cores at 1.7 GHz: Cortex-A53 - 4 cores at 2.3 GHz: Cortex-A73 |
| Manufacturing | Samsung | Samsung |
| Lithography process | 8 nanometers | 10 nanometers |
| Neural processor (NPU) | Hexagon 692 | Yes |
| Graphics | Adreno 618 | Mali-G72 MP3 |
| GPU shading units | 256 | 36 |
| GPU clock | 750 MHz | 850 MHz |
| FLOPS | ~384 GFLOPS | ~61.2 GFLOPS |
Benchmarks
Geekbench 6 (Single-Core)
Geekbench 6 (Multi-Core)
Compute Score (GPU)
| Compute Score (GPU) | 1215 | 745 |
| Single-core score | 751 | 372 |
| Multi-core score | 1805 | 1204 |
AnTuTu Benchmark 11
| CPU | 228452 | 135389 |
| GPU | 50275 | 30103 |
| Memory | 92986 | 90583 |
| UX | 143936 | 96624 |
| Total score | 515649 | 352699 |
| Samples | [10 tests] | [10 tests] |
3DMark Wild Life Extreme
| Stability | 98% | - |
| Graphics test | 1 FPS | - |
| Graphics score | 314 | - |
PCMark 3.0
| Web score | 6590 | - |
| Video editing | 5430 | - |
| Photo editing | 16585 | - |
| Data manipulation | 6786 | - |
| Writing score | 9568 | - |
Recent User Tests
Xiaomi Redmi Note 9S
| Date | Benchmark | Result |
|---|---|---|
| π 2026-07-27 (Makasin0) | AnTuTu 11 | 624334 |
| π 2026-06-14 (Dai) | AnTuTu 11 | 502298 |
| π 2026-06-07 (Makasin) | AnTuTu 11 | 618293 |
| π 2025-12-25 (Felipe) | AnTuTu 11 | 487011 |
| π 2025-11-13 (Unixon) | AnTuTu 11 | 527461 |
Samsung Galaxy A51
| Date | Benchmark | Result |
|---|---|---|
| π 2026-08-30 (Aginves) | AnTuTu 11 | 357049 |
| π 2026-08-28 (ROBIZ) | AnTuTu 11 | 331364 |
| π 2026-07-15 (Somya Lohiya) | AnTuTu 11 | 298360 |
| π 2026-06-20 (14burgos) | AnTuTu 11 | 393276 |
| π 2026-06-15 (Robiz) | AnTuTu 11 | 302904 |
Memory
| RAM size | 4 GB | 4 GB |
| Memory type | LPDDR4X | LPDDR4X |
| Memory clock | 2133 MHz | 1866 MHz |
| Channels | 2 | 2 |
| Storage size | 64 GB | 64 GB |
| Storage type | UFS 2.1 | UFS 2.0 |
| Memory card | MicroSD | MicroSD |
| Memory card max size | Up to 512 GB | Up to 512 GB |
Software
| Operating system | Android 10.0 (Can be upgraded to Android 12) | Android 10 (Can be upgraded to Android 13) |
| ROM | MIUI 14 | One UI 5.1 |
| OS size | 18 GB | 23 GB |
| OS updates | - | 2 years |
| Security updates | - | 4 years |
Battery
| Capacity | 5020 mAh | 4000 mAh |
| Max charge power | 18 W | 15 W |
| Battery type | Li-Po | Li-Po |
| Replaceable | No | No |
| Wireless charging | No | No |
| Reverse charging | No | No |
| Fast charging | Yes (50% in 50 min) | Yes (40% in 35 min) |
| Full charging time | 2:30 hr | 1:50 hr |
| Web browsing | 10:56 hr | 07:15 hr |
| Watching video | 15:15 hr | 11:25 hr |
| Gaming | 05:45 hr | 04:49 hr |
| Standby | 136 hr | 81 hr |
General battery life
Smartphones With Long Battery Life (#106th place)
Main camera
| Matrix | 48 megapixels | 48 megapixels |
| Image resolution | 8000 x 6000 | 8000 x 6000 |
| Zoom | Digital | Digital |
| Flash | LED | LED |
| Stabilization | Digital | Digital |
| 8K video recording | No | No |
| 4K video recording | Up to 30FPS | Up to 30FPS |
| 1080p video recording | Up to 60FPS | Up to 30FPS |
| Slow motion | 960 FPS (720p) | 960 FPS (720p) |
| Angle of widest lens | 119Β° | 120Β° |
| Lenses | 1) Standard: 48 MP 2) Ultrawide: 8 MP 3) Macro: 5 MP 4) Depth: 2 MP |
1) Standard: 48 MP 2) Ultrawide: 12 MP 3) Macro: 5 MP 4) Depth: 5 MP |
| Camera features | - Bokeh mode - Pro mode |
- Bokeh mode - Pro mode |
| Image resolution | 48 MP | 48 MP |
| Aperture | f/1.8 | f/2.0 |
| Focal length | 26 mm | 26 mm |
| Sensor | Samsung S5KGM2 | Sony IMX582 |
| Sensor size | 1/2" (β 0.5 inch) | 1/2" (β 0.5 inch) |
| Pixel size | 0.8 micron | 0.8 micron |
| Autofocus | Phase autofocus | Phase autofocus |
| Stabilization | Digital | Digital |
| Image resolution | 8 MP | 12 MP |
| Aperture | f/2.2 | f/2.2 |
| Focal length | 13 mm | 13 mm |
| Sensor | Omnivision OV8856 | - |
| Sensor size | 1/4.0" (β 0.25 inch) | - |
| Pixel size | 1.12 micron | 1.12 micron |
| Stabilization | Digital | Digital |
| Image resolution | 5 MP | 5 MP |
| Aperture | f/2.4 | f/2.4 |
| Focal length | - | 40 mm |
| Sensor | Samsung S5KE9 | - |
| Pixel size | 1.12 micron | 1.12 micron |
| Stabilization | Digital | Digital |
Selfie camera
| Megapixels | 16 megapixels | 32 megapixels |
| Image resolution | 4920 x 3264 | 6560 x 4928 |
| Aperture | f/2.5 | f/2.2 |
| Focal length | - | 26 mm |
| Sensor | Omnivision OV16A1Q | Samsung S5KGD1 |
| Sensor size | 1/3.06" (β 0.33 inch) | 1/2.8" (β 0.36 inch) |
| Pixel size | 1 micron | 0.8 micron |
| Autofocus | No | No |
| Stabilization | Digital | Digital |
| Video resolution | 1080p (Full HD) at 30 FPS | 2160p (4K) at 30 FPS |
| Depth sensor (TOF 3D) | No | No |
Connectivity
| Wi-Fi standard | Wi-Fi 5 (802.11 b/g/n/ac) | Wi-Fi 5 (802.11 b/g/n/ac) |
| Wi-Fi features | - Dual Band - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
- Dual Band - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
| Bluetooth version | 5 | 5 |
| Bluetooth features | LE, HID, A2DP | PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP |
| USB type | USB Type-C | USB Type-C |
| USB version | 2 | 2 |
| USB features | - Charging - USB-Storage mode - OTG |
- Charging - USB-Storage mode - OTG |
| GPS | GPS, GLONASS, Beidou, Galileo, NAVIC | GPS, GLONASS, Beidou, Galileo |
| NFC* | No | Yes |
| Infrared port | Yes | No |
| Number of SIM* | 2 | 2 |
| Type of SIM card | Nano | Nano |
| Multi SIM mode | Standby | Standby |
| eSIM support* | No | No |
| Hybrid slot | No | No |
| LTE Cat* | 12 | 12 |
| 5G support | No | No |
Sound
| Speakers | Mono | Mono |
| Headphone audio jack | Yes | Yes |
| FM radio | Yes | Yes |
| Dolby Atmos | No | Yes |
Speakers test
Max loudness
Other
| Category | Mid-range | Mid-range |
| Announced | March 2020 | December 2019 |
| Release date | April 2020 | December 2019 |
| Launch price (MSRP) | $200 | $399 |
| Successor | - Xiaomi Redmi Note 12S | - Samsung Galaxy A57 5G |
| SAR (head) | 0.72 W/kg | 0.596 W/kg |
| SAR (body) | 0.98 W/kg | 1.45 W/kg |
| Sensors | - Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Compass - Fingerprint |
- Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Compass - Fingerprint |
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.
Conclusion
After analyzing all the data, we think that the Xiaomi Redmi Note 9S is definitely a better buy.
Cast your vote
Total votes: 1029