Xiaomi Redmi Note 9 Pro vs Samsung Galaxy A51
Here we compared two mid-range smartphones: the 6.67-inch Xiaomi Redmi Note 9 Pro (with Qualcomm Snapdragon 720G) that was released on April 30, 2020, against the Samsung Galaxy A51, which is powered by Exynos 9 Octa 9611 and came out 4 months before. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets.
Key differences
Reasons to consider the Xiaomi Redmi Note 9 Pro
- Shows 45% longer battery life (38:26 vs 26:33 hours)
- Comes with 1020 mAh larger battery capacity: 5020 vs 4000 mAh
- 55% better performance in AnTuTu Benchmark (336K versus 217K)
- Faster storage type - UFS 2.1 versus UFS 2.0
- More energy-efficient CPU – Snapdragon 720G
- 62% faster in single-core GeekBench 5 test: 571 and 352 points
- Has a built-in infrared port
Reasons to consider the Samsung Galaxy A51
- More recent OS version: Android 13 versus 12
- Super AMOLED display (versus competitor's IPS LCD)
- Supports Dolby Atmos sound technology
- Weighs 37 grams less
- The front-facing camera can record video at 4K
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Review
Display
Screen quality, color accuracy, brightness
Performance
CPU/GPU performance in apps and games
Battery
Battery life, charging type and speed
Camera
Photo and video recording quality
Connectivity
Networks, ports, data transmission
NanoReview score
Final comparison evaluation
Value for money
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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 |
| Max rated brightness | 450 nits | 400 nits |
| HDR support | Yes, HDR10 | No |
| Screen protection | Corning Gorilla Glass 5 | Corning Gorilla Glass 3 |
| Screen-to-body ratio | 84.5% | 87.4% |
| Display features | - | - Always-On Display |
| RGB color space | 99.8% | 98.8% |
| PWM | 2404 Hz | 242 Hz |
| Response time | 35.2 ms | 25 ms |
| Contrast | 1649:1 | ∞ Infinity |
Peak brightness test (auto)
Design and build
| Height | 165.8 mm (6.53 inches) | 158.5 mm (6.24 inches) |
| Width | 76.7 mm (3.02 inches) | 73.6 mm (2.9 inches) |
| Thickness | 8.8 mm (0.35 inches) | 7.9 mm (0.31 inches) |
| Weight | 209 g (7.37 oz) | 172 g (6.07 oz) |
| Waterproof | No | No |
| Rear material | Glass | Plastic |
| Frame material | Plastic | Plastic |
| Colors | White, Gray, Green | White, Black |
| Fingerprint scanner | Yes, in home 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 |
| L3 cache | 1 MB | - |
| Lithography process | 8 nanometers | 10 nanometers |
| Graphics | Adreno 618 | Mali-G72 MP3 |
| GPU clock | 750 MHz | 850 MHz |
| FLOPS | ~435 GFLOPS | ~259 GFLOPS |
Benchmarks
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)
AnTuTu Benchmark 9
| CPU | 106874 | 49711 |
| GPU | 85456 | 53719 |
| Memory | 57373 | 43824 |
| UX | 86597 | 70475 |
| Total score | 336605 | 217818 |
3DMark Wild Life Performance
| Stability | 98% | 95% |
| Graphics test | 6 FPS | 4 FPS |
| Graphics score | 1038 | 812 |
| PCMark 3.0 score | 8094 | - |
Memory
| RAM size | 4, 6, 8 GB | 4, 6 GB |
| Memory type | LPDDR4X | LPDDR4X |
| Memory clock | 2133 MHz | 1866 MHz |
| Channels | 2 | 2 |
| Storage size | 64, 128 GB | 64, 128 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 13 | One UI 5.0 |
| OS size | 18.9 GB | 23 GB |
Battery
| Capacity | 5020 mAh | 4000 mAh |
| Charge power | 33 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 30 min) | Yes (40% in 35 min) |
| Full charging time | 1:20 hr | 1:50 hr |
| Web browsing | 14:25 hr | 09:34 hr |
| Watching video | 13:55 hr | 11:29 hr |
| Gaming | 06:03 hr | 05:12 hr |
| Standby | 135 hr | 83 hr |
General battery life
Camera
| Matrix | 64 megapixels | 48 megapixels |
| Image resolution | 9248 x 6920 | 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 | 119° | 120° |
| Lenses | 4 (64 MP + 8 MP + 5 MP + 2 MP) | 4 (48 MP + 12 MP + 5 MP + 5 MP) |
| Wide (main) lens | - 64 MP - Aperture: f/1.9 - Focal length: 26 mm - Pixel size: 0.8 micron - Sensor: 1/1.72", Samsung Bright S5KGW1 (ISOCELL CMOS) - Phase autofocus |
- 48 MP - Aperture: f/2.0 - Focal length: 26 mm - Pixel size: 0.8 micron - Sensor: 1/2", Sony IMX582 (Exmor-RS CMOS) - Phase autofocus |
| Ultra-wide lens | - 8 MP - Aperture: f/2.2 - Focal length: 13 mm - Pixel size: 1.12 micron - Sensor: 1/4.0", GalaxyCore GC8034 (BSI CMOS) |
- 12 MP - Aperture: f/2.2 - Focal length: 13 mm - Pixel size: 1.12 micron |
| Macro lens | - 5 MP - Aperture: f/2.4 - Pixel size: 1.12 micron - Sensor: 1/5.0", Samsung S5K5E9 (ISOCELL CMOS) |
- 5 MP - Aperture: f/2.4 - Focal length: 40 mm - Pixel size: 1.12 micron |
| Depth lens | - 2 MP - Aperture: f/2.4 - Pixel size: 1.75 micron - Sensor: 1/5", GalaxyCore GC02M1 (CMOS) |
- 5 MP - Aperture: f/2.2 - Pixel size: 1.12 micron - Sensor: 1/5.0" (CMOS) |
| Camera features | - Bokeh mode - Pro mode - RAW support |
- Bokeh mode - Pro mode |
| Megapixels | 16 megapixels | 32 megapixels |
| Image resolution | 4920 x 3264 | 6560 x 4928 |
| Aperture | f/2.48 | f/2.2 |
| Focal length | - | 26 mm |
| Pixel size | 1 microns | 0.8 microns |
| Sensor type | CMOS | ISOCELL CMOS |
| Sensor size | 1/3.1" | 1/2.8" |
| Video resolution | 1080p (Full HD) at 30 FPS | 2160p (4K) at 30 FPS |
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* | Yes | 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 | April 2020 | December 2019 |
| Release date | May 2020 | December 2019 |
| SAR (head) | 0.66 W/kg | 0.596 W/kg |
| SAR (body) | 1.02 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
If the performance, battery life, and design are more important to you, then choose the Xiaomi Redmi Note 9 Pro. But if the software and sound are more of a priority – go for the Samsung Galaxy A51.
Cast your vote
Total votes: 2060
