Home Phone comparison Xiaomi Redmi 9A and Samsung Galaxy A51 - Which is better?

Xiaomi Redmi 9A vs Samsung Galaxy A51

36 out 100
Xiaomi Redmi 9A
VS
41 out 100
Samsung Galaxy A51
Xiaomi Redmi 9A
Samsung Galaxy A51

Compared 2 smartphones : Xiaomi Redmi 9A Manufactured in August, 2020, with display 6.53 with chipsetMediaTek Helio G25, vs Samsung Galaxy A51, Manufactured in December, 2019 with chipsetSamsung Exynos 9 Octa 9611. Below are specs, tests, pros and cons for each device

  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery Life
  6. Cameras
  7. Comments (0)

Key Differences

Device key advantages
Reasons to choose Xiaomi Redmi 9A
  • Larger display: 6.53in
  • Higher battery capacity: 5000mAh vs 4000mAh
Reasons to choose Samsung Galaxy A51
  • Higher pixel density: 405ppi
  • Lighter design: 172g vs 194g
  • Supports Dolby Atmos
  • Fingerprint scanner

Versions

Available versions and configurations
Memory Options - 2/32 GB
- 3/32 GB
- 4/64 GB
- 4/128 GB
- 6/128 GB		 - 4/64 GB
- 4/128 GB
- 6/128 GB
- 8/128 GB
- 8/256 GB

Review

Key Specs Xiaomi Redmi 9A and Samsung Galaxy A51
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
NanoReview Score
Overall score by NanoReview
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Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison
Smartphones:
Xiaomi Redmi 9A
vs
Samsung Galaxy A51

Display

Display quality comparison
Type IPS LCD Super AMOLED
Size 6.53 in 6.5 in
Resolution 720x1600 pixels 1080x2400 pixels
Aspect ratio 20:9 20:9
Pixel density 269 ppi 405 ppi
Refresh rate 60 Hz 60 Hz
Adaptive refresh rate No No
Max brightness 400 nits 400 nits
HDR support No No
Screen-to-body ratio 81.1 % 87.5 %
Features n/a Always-On Display
Display test
Peak brightness (auto)
Xiaomi Redmi 9A
434 nits
Samsung Galaxy A51
631 nits
sRGB gamut92.9 %98.8 %
PWM (Flicker)n/a242 Hz
Response time40 ms25 ms
Contrast1318:1∞ Infinite
Sources: NotebookCheck [Xiaomi Redmi 9A], [Samsung Galaxy A51]

Design & Build

Design and ergonomics comparison
Height 164.9 mm (6.49 in) 158.5 mm (6.24 in)
Width 77 mm (3.03 in) 73.6 mm (2.9 in)
Thickness 9 mm (0.35 in) 7.9 mm (0.31 in)
Weight 194 g (6.84 oz) 172 g (6.07 oz)
Water resistance No No
Back panel Plastic Plastic
Frame Plastic Plastic
Colors - Gray
- Blue
- Green		 - White
- Black
Fingerprint sensor No Yes In-Display
Screen-to-body ratio
Xiaomi Redmi 9A
81.1 %
Samsung Galaxy A51
87.5 %

Performance

Testing Xiaomi Redmi 9A and Samsung Galaxy A51 In benchmarks
Processor
Chipset MediaTek Helio G25 Samsung Exynos 9 Octa 9611
Max Frequency 2000 MHz 2300 MHz
CPU Cores 8 (4 + 4) 8 (4 + 4)
Architecture - 4/1.5 (Cortex-A53)
- 4/2 (Cortex-A53)		 - 4/1.7 (Cortex-A53)
- 4/2.3 (Cortex-A73)
Process TSMC Samsung
Transistor Size 12 nm 10 nm
Neural Processor No Yes
Graphics PowerVR GE8320 Mali-G72 MP3
GPU Cores 32 54
GPU Frequency 650 MHz 850 MHz
FLOPS 41.8 GFLOPS 113.8 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Xiaomi Redmi 9A
472
Samsung Galaxy A51
512
Geekbench 6 (Multi-Core)
Xiaomi Redmi 9A
1524
Samsung Galaxy A51
1556
Geekbench 6 (Single-Core)472512
Geekbench 6 (Multi-Core)15241556
AnTuTu 10
AnTuTu 10
Xiaomi Redmi 9A
125125
Samsung Galaxy A51
268760
CPU5072883857
GPU1684445166
Memory2861163828
UX2894275909
NanoReview Score125125268760
3DMark Wild Life
3DMark Wild Life
Xiaomi Redmi 9A
n/a
Samsung Galaxy A51
812
Max Surface Temp.n/a42.2 °C
Stabilityn/a95 %
Graphics Testn/a4 fps
Graphics Scoren/a812
Sources: 3DMark [Samsung Galaxy A51]

Memory

RAM
RAM Size - 2 GB
- 4 GB
- 6 GB		 - 4 GB
- 6 GB
Memory Type LPDDR4X LPDDR4X
Memory Frequency 1600 MHz 1866 MHz
Channels 2 2
Storage
Storage Capacity- 32 GB
- 64 GB
- 128 GB		- 64 GB
- 128 GB
Storage TypeeMMC 5.1UFS 2.0
Memory CardMicroSDMicroSD

Software

OS Android 10 (Upgradeable to Android 11) Android 10 (Upgradeable to Android 13)
OS Size 11 GB 23 GB
UI Skin MIUI 12.5 Enhanced One UI 5.1

Battery

Volume 5000 mAh 4000 mAh
Max Charging Power 10 W 15 W
Battery Type Li-Po Li-Po
Removable No No
Wireless Charging No No
Reverse Charging No No
Fast Charging No Yes (40% in 35 min)
Full Charge Time 2:55 h 1:50 h
Battery Life Test
Battery Life
Xiaomi Redmi 9A
24:07
Samsung Galaxy A51
17:53
Web Browsing10:08 h07:15 h
Video Playback13:37 h11:25 h
Games05:37 h04:49 h
Standby Mode118 h81 h

Main camera

Matrix 13 MP 48 MP
Photo resolution 4128x3096 pixels 8000x6000 pixels
Zoom Digital Digital
Flash LED LED
Stabilization Digital Digital
8K Recording No No
4K Recording No Yes (Up to 30 fps)
1080p Recording Yes (Up to 30 fps) Yes (Up to 30 fps)
Slow Motion No 960 fps (720p)
Wide-angle lens n/a 120 °
Lenses count Standard: 13 MP Standard: 48 MP
Ultra-wide: 12 MP
Macro: 5 MP
Depth: 5 MP
Features - Bokeh effect
- Pro mode
Main lens
Matrix13 MP48 MP
Aperturef/2.2f/2.0
Focal length28 mm26 mm
Sensorn/aSony IMX582
Sensor sizen/a1/2
Pixel size1 μm0.8 μm
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalDigital
Ultra-wide lens
Matrixn/a12 MP
Aperturen/af/2.2
Focal lengthn/a13 mm
Pixel sizen/a1.12 μm
Stabilizationn/aDigital

Front camera

Matrix 5 MP 32 MP
Photo resolution 2560x1960 pixels 6560x4928 pixels
Aperture f/2.2 f/2.2
Focal length n/a 26 mm
Sensor CMOS Samsung S5KGD1
Sensor size n/a 1/2.8
Pixel size 1.12 μm 0.8 μm
Autofocus No No
Stabilization Digital Digital
Video resolution 1080p (Full HD) at 30 fps 2160p (4K) at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 4 (802.11 a/b/g/n) Wi-Fi 5 (802.11 a/b/g/n/ac)
Wi-Fi features - 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 Micro USB USB Type-C
USB version 2 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
NFC* No Yes
Infrared Port No No
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotNoNo
2G BandsGSM B2/3/5/8GSM 850 / 900 / 1800 / 2100 / 2600
3G BandsWCDMA B1/2/4/5/8UMTS 850 / 900 / 1900 / 2100
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B20/B28)LTE (B850/B900/B1800/B2100/B2600)
LTE category412
5G SupportNoNo

Sound

Speakers Mono Mono
3.5 mm Jack Yes Yes
FM Radio Yes Yes
Dolby Atmos No Yes
Speaker Test
Max Volume
Xiaomi Redmi 9A
76.5 dB
Samsung Galaxy A51
81.7 dB

Other

Class Budget Mid-range
Announced June, 2020 yr December, 2019 yr
Release Date August, 2020 yr December, 2019 yr
Launch Price ($) 100 399
Sensors - Proximity Sensor
- Accelerometer
- Ambient Light Sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

No clear favorite identified yet; updates may follow as new data arrives.

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