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 43% longer battery life (123 vs 86 hours)
- Comes with 1020 mAh larger battery capacity: 5020 vs 4000 mAh
- 59% better performance in AnTuTu Benchmark (280K versus 176K)
- Faster storage type - UFS 2.1 versus UFS 2.0
- More energy-efficient CPU – Snapdragon 720G
- 64% faster in single-core GeekBench 5 test: 579 and 353 points
- Has a built-in infrared port
Reasons to consider the Samsung Galaxy A51
- More recent OS version: Android 11 versus 10
- 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
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
You can enter your local price of these phones (in USD or any other currency) and click on the "Calculate" button to see which one has a better value for money.
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 |
| 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 |
Max. Brightness
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 gramm (7.37 oz) | 172 gramm (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 |
| RAM size | 6 GB | 4, 6 GB |
| Memory type | LPDDR4X | LPDDR4X |
| Memory clock | 2133 MHz | 1866 MHz |
| Channels | 2 | 2 |
| Storage size | 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 |
Benchmarks
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)
AnTuTu Benchmark 8
Software
| Operating system | Android 10.0 | Android 10 (Can be upgraded to Android 11) |
| ROM | MIUI 11 | One UI 3.0 |
| OS size | 18.9 GB | 23 GB |
Battery
| Capacity | 5020 mAh | 4000 mAh |
| Charge power | 30 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 |
Battery life tests
Web browsing (Wi-Fi)
Watching videos (Player)
Talk (3G)
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 120FPS |
| 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", Samsung S5KGM2 (ISOCELL 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 |
- 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) при 30 FPS | 2160p (4K) при 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 |
| Launch price | ~ 187 USD | ~ 250 USD |
| 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 and battery life are more important to you, then choose the Xiaomi Redmi Note 9 Pro. But if the software, design, and sound are more of a priority – go for the Samsung Galaxy A51.
Cast your vote
Total votes: 1662
