Both phones in the name are in the same price segment, so it is logical to compare them and determine which is cooler. Below is an objective comparison based on the test results There is no subjectivity here.
Redmi Note 9 Pro Specifications:
- Case: glass, Gorilla Glass 5, plastic frame
- Screen: IPS, 6.67 ”, 2400 × 1080, HDR10, Gorilla Glass 5
- OS: Android 10 + MIUI11
- CPU: 8nm Snapdragon 720G
- Memory: 6 GB RAM + 64/128 GB disk + dedicated memory card slot
- Main camera: 64 MP, /1.9 + 8 MP wide-angle camera, f / 2.2 + 5 MP macro + 2 MP depth sensor
- Front camera: 16 MP, f / 2.5
- Battery: 5020 mAh, fast charge 30 W
- Other: NFC, jack 3.5 mm, Bluetooth 5.0, USB Type-C, Infrared
Samsung A51 Specifications:
- Plastic case, Gorilla Glass 3 front
- Screen: Super Amoled, 6.5 ”(spade), 2400 × 1080
- Android 10 on board
- CPU: 10nm Exynos 9611
- Memory: 4/64 GB or 4/128 GB or 6/128 GB + dedicated memory card slot
- Camera: main - 48 megapixels, f / 2, there is a “shirik” of 8 megapixels, a macro camera of 5 megapixels and a depth sensor of 5 megapixels
- Front camera: 32 MP, f / 2.2
- Battery: 4000 mAh, fast charge 15 W
- Communication and connectors: NFC, jack 3.5 mm, Wi-Fi 5 GHz, Bluetooth 5.0, USB Type-C
- Features: fingerprint scanner under the screen
The main differences: screens, processors, batteries, cameras. That is, the devices are completely different. Further - in more detail.
Screen Comparison Samsung Galaxy A51 VS Redmi Note 9 Pro:
On the Redmi Note 9 Pro there is an IPS screen, on the Samsung A51 - Amoled. There is a fundamental difference between these types - IPS has a backlight, so it is unrealistic to achieve maximum contrast there.
Plus, Redmi Note 9 Pro is that the screen has the best Gorilla Glass 5 glass, on Samsung - the old Gorilla Glass 3.
Redmi Note 9 Pro:
- White brightness: 616 cd / m2
- Black brightness: 0.487 cd / m2
- Contrast: 1265: 1
- Color Accuracy: 2.2
Samsung A51:
- White brightness: 636 cd / m2
- Black brightness: 0 cd / m2
- Contrast: maximum
- Color Accuracy, DeltaE: 1.8
Technically, Samsung’s screen is better, but it’s Amoled, which means there is PWM at low brightness. Reading books in the dark is uncomfortable on it.
Battery and autonomy
Samsung has no problems with autonomy - this is a fact. A 4000 mAh battery is enough for two days of operation in moderate mode. However, Redmi Note 9 Pro is a monster in terms of autonomy. He has a 5260 mAh battery (versus 4000 mAh on Samsung), which played a key role.
Redmi Note 9 Pro:
- Continuous calls (screen off): 43:57
- Wi-Fi web surfing (screen brightness at 200 cd / m2): 17:23 h
- Video playback (brightness 200 cd / m2): 16:45 h
- Charging speed: 80% in 30 minutes
Samsung Galaxy A51:
- Continuous calls (screen off): 21:51 h
- Wi-Fi web surfing: 13:21 h
- Video playback (any wireless connection is disabled): 14:22 h
- Charging speed: 35% in 30 minutes, full cycle - 2 hours 14 minutes
Redmi Note 9 Pro wins by margin. When the priority is working time without recharging, it is better to take Xiaomi.
Performance Samsung Galaxy A51 VS Redmi Note 9 Pro:
Samsung has a “native” Exynos processor, made using 10-nm technology. This is the Exynos 9611, which many blame for the inefficient distribution of energy and poor graphics. Qualcomm’s new hardware on Redmi Note 9 Pro is the 8nm Snapdragon 720G. Let's figure out who is more powerful. For this, it is appropriate to provide test results.
GeekBench 5.1 (multi-core)
- Redmi Note 9 Pro - 1785
- Samsung Galaxy A51 - 1294
GeekBench 5.1 (single-core)
- Redmi Note 9 Pro - 571
- Samsung Galaxy A51 - 347
Redmi Note 9 Pro wins in all benchmarks by a wide margin, which was expected. This is a more powerful smartphone, showing better results in benchmarks. If you plan to play games, then it is better to take Redmi Note 9 Pro.
Cameras Samsung Galaxy A51 VS Redmi Note 9 Pro:
Two phones have Samsung cameras, but on the Galaxy A51 there is a 48 megapixel sensor, on Redmi - 64 megapixels. Both smartphones also have wide-angle cameras.
Samsung Galaxy A51 gives the best shots: more accurate exposure, detail is higher. In low light, the situation is similar: the Samsung Galaxy A51 produced less noise, although it lost in detail. But even so, the Samsung photo looks better.
Conclusion
Better Redmi Note 9 Pro:
- Glass back cover
- IPS screen without PWM
- Gorilla Glass 5 on screen
- Higher autonomy and charging speed
- The best hardware
The better Samsung A51:
- Samsung is an A-brand, and with a high probability assembly and quality of components are better here, but there is no way to check it
- Amoled screen with max. contrast
- Fingerprint scanner below the screen
- The best main camera
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