Samsung Galaxy Z Flip 4 vs Xiaomi Redmi Note 9 Pro

Compared 2 smartphones : Samsung Galaxy Z Flip 4 Manufactured in August, 2022, with display 6.7 with chipsetQualcomm Snapdragon 8 Plus Gen 1, vs Xiaomi Redmi Note 9 Pro, Manufactured in May, 2020 with chipsetQualcomm Snapdragon 720G. Below are specs, tests, pros and cons for each device

Key Differences

Device key advantages
Reasons to choose Samsung Galaxy Z Flip 4
  • Larger display: 6.7in
  • Higher pixel density: 425ppi
  • Higher refresh rate: 120Hz
  • Lighter design: 187g vs 209g
  • Newer Bluetooth version: 5.2 vs 5
  • Supports Dolby Atmos
  • Built-in eSIM
Reasons to choose Xiaomi Redmi Note 9 Pro
  • Higher battery capacity: 5020mAh vs 3700mAh
  • Infrared port

Versions

Available versions and configurations
Memory Options - 8/128 GB
- 8/256 GB
- 8/512 GB
- 4/64 GB
- 4/128 GB
- 6/128 GB

Review

Key Specs Samsung Galaxy Z Flip 4 and Xiaomi Redmi Note 9 Pro
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
Adjust each parameter’s importance to find the best match for you.
Customize your score
Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison

Display

Display quality comparison
Type Dynamic AMOLED IPS LCD
Size 6.7 in 6.67 in
Resolution 1080x2640 pixels 1080x2400 pixels
Aspect ratio 21.9:9 20:9
Pixel density 425 ppi 395 ppi
Refresh rate 120 Hz 60 Hz
Adaptive refresh rate Yes No
Max brightness 500 nits 450 nits
HDR support Yes HDR10+ Yes HDR10
Screen-to-body ratio 85.7 % 84.4 %
Features - DCI-P3
- Always-On Display
n/a
Display test
Peak brightness (auto)
Samsung Galaxy Z Flip 4
910 nits
Xiaomi Redmi Note 9 Pro
615 nits
sRGB gamut97 %99.8 %
PWM (Flicker)120 Hz2404 Hz
Response time1 ms35.2 ms
Contrast∞ Infinite1649:1

Design & Build

Design and ergonomics comparison
Height 165.2 mm (6.5 in) 165.8 mm (6.53 in)
Width 71.9 mm (2.83 in) 76.7 mm (3.02 in)
Thickness 6.9 mm (0.27 in) 8.8 mm (0.35 in)
Weight 187 g (6.6 oz) 209 g (7.37 oz)
Water resistance IPX8 No
Back panel Glass Glass
Frame Metal Plastic
Colors - Black
- Gold
- Blue
- Green
- Purple
- White
- Gray
- Green
Fingerprint sensor Yes In-Button Yes In-Button
Screen-to-body ratio
Samsung Galaxy Z Flip 4
85.7 %
Xiaomi Redmi Note 9 Pro
84.4 %

Performance

Testing Samsung Galaxy Z Flip 4 and Xiaomi Redmi Note 9 Pro In benchmarks
Processor
Chipset Qualcomm Snapdragon 8 Plus Gen 1 Qualcomm Snapdragon 720G
Max Frequency 3190 MHz 2300 MHz
CPU Cores 8 (1 + 3 + 4) 8 (2 + 6)
Architecture - 4/2 (Cortex-A510)
- 3/2.75 (Cortex-A710)
- 1/3.2 (Cortex-X2)
- 6/1.8 (Kryo 465 Silver (Cortex-A55))
- 2/2.3 (Kryo 465 Gold (Cortex-A76))
Process TSMC Samsung
Transistor Size 4 nm 8 nm
Neural Processor Hexagon Hexagon 692
Graphics Adreno 730 Adreno 618
GPU Cores 1024 256
GPU Frequency 900 MHz 750 MHz
FLOPS 1843.2 GFLOPS 384 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy Z Flip 4
1719
Xiaomi Redmi Note 9 Pro
719
Geekbench 6 (Multi-Core)
Samsung Galaxy Z Flip 4
4200
Xiaomi Redmi Note 9 Pro
1874
Geekbench 6 (Single-Core)1719719
Geekbench 6 (Multi-Core)42001874
AnTuTu 10
AnTuTu 10
Samsung Galaxy Z Flip 4
1215795
Xiaomi Redmi Note 9 Pro
389839
CPU359278139577
GPU40245573153
Memory20628072832
UX247782104277
NanoReview Score1215795389839
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy Z Flip 4
8667
Xiaomi Redmi Note 9 Pro
1044
Max Surface Temp.36.8 °C42.3 °C
Stability46 %99 %
Graphics Test51 fps6 fps
Graphics Score86671044
PCMark 3.0
PCMark 3.0
Samsung Galaxy Z Flip 4
13742
Xiaomi Redmi Note 9 Pro
8136
Writing score169319643
Web score114026022
Video editing74885453
Data manipulation110216923
NanoReview Score137428136

Memory

RAM
RAM Size 8 GB - 4 GB
- 6 GB
- 8 GB
Memory Type LPDDR5 LPDDR4X
Memory Frequency 3200 MHz 2133 MHz
Channels 4 2
Storage
Storage Capacity- 128 GB
- 256 GB
- 512 GB
- 64 GB
- 128 GB
Storage TypeUFS 3.1UFS 2.1
Memory CardNoMicroSD

Software

OS Android 12 (Upgradeable to Android 14) Android 10.0 (Upgradeable to Android 12)
OS Size 24 GB 18.9 GB
UI Skin One UI 6.1 MIUI 14

Battery

Volume 3700 mAh 5020 mAh
Max Charging Power 25 W 33 W
Battery Type Li-Po Li-Po
Removable No No
Wireless Charging Yes (15 W) No
Reverse Charging Yes (Wireless) No
Fast Charging Yes (55% in 30 min) Yes (50% in 30 min)
Full Charge Time 1:15 h 1:20 h
Battery Life Test
Battery Life
Samsung Galaxy Z Flip 4
16:36
Xiaomi Redmi Note 9 Pro
26:36
Web Browsing06:12 h10:27 h
Video Playback09:34 h13:57 h
Games04:05 h05:33 h
Standby Mode86 h143 h

Main camera

Matrix 12 MP 64 MP
Photo resolution 4000x3000 pixels 9248x6920 pixels
Zoom Digital Digital
Flash LED LED
Stabilization Optical Digital
8K Recording No No
4K Recording Yes (Up to 60 fps) Yes (Up to 30 fps)
1080p Recording Yes (Up to 60 fps) Yes (Up to 60 fps)
Slow Motion 960 fps (720p) 960 fps (720p)
Wide-angle lens 123 ° 119 °
Lenses count Standard: 12 MP
Ultra-wide: 12 MP
Standard: 64 MP
Ultra-wide: 8 MP
Macro: 5 MP
Depth: 2 MP
Features - Bokeh effect
- Pro mode
- Bokeh effect
- Pro mode
- RAW support
Main lens
Matrix12 MP64 MP
Aperturef/1.8f/1.9
Focal length27 mm26 mm
SensorSony IMX563Samsung Bright S5KGW1
Sensor size1/1.761/1.72
Pixel size1.8 μm0.8 μm
AutofocusPhase autofocus (Dual Pixel)Phase autofocus
StabilizationOpticalDigital
Ultra-wide lens
Matrix12 MP8 MP
Aperturef/2.2f/2.2
Focal length13 mm13 mm
SensorSony IMX258GalaxyCore GC8034
Sensor size1/3.061/4.0
Pixel size1.12 μm1.12 μm
StabilizationDigitalDigital
Main camera DxOMark results
Photo quality
Samsung Galaxy Z Flip 4
132
Xiaomi Redmi Note 9 Pro
n/a
Video quality
Samsung Galaxy Z Flip 4
128
Xiaomi Redmi Note 9 Pro
n/a
Overall camera score
Samsung Galaxy Z Flip 4
127
Xiaomi Redmi Note 9 Pro
n/a
Bokeh60n/a
Preview65n/a
Zoom95n/a

Front camera

Matrix 10 MP 16 MP
Photo resolution 3648x2736 pixels 4920x3264 pixels
Aperture f/2.4 f/2.48
Focal length 26 mm n/a
Sensor Sony IMX374 OmniVision OV32A1Q
Sensor size 1/3.2 1/3.1
Pixel size 1.22 μm 1 μm
Autofocus No No
Stabilization Digital Digital
Video resolution 2160p (4K) at 60 fps 1080p (Full HD) at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 6 (802.11 a/b/g/n/ac/ax) Wi-Fi 5 (802.11 a/b/g/n/ac)
Wi-Fi features - Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5.2 5
Bluetooth features LE LE, HID, 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
- GPS
- GLONASS
- Beidou
- Galileo
- NAVIC
NFC* Yes Yes
Infrared Port No Yes
Connectivity
SIM Count*12
SIM TypeNanoNano
SIM Moden/aDual SIM Standby
eSIM Support *YesNo
Hybrid SlotNoNo
2G BandsGSM 850 MHz, 900 MHz, 1800 MHz, 1900 MHzGSM 850 / 900 / 1800 / 2100 / 2600 / 2300 / 2500
3G BandsUMTS Band I (2100), Band II (1900), Band IV (1700/2100), Band V (850)HSDPA 850 / 900 / 1900 / 2100
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B14/B18/B19/B20/B25/B26/B28/B38/B39/B40/B46/B48/B66/B71)LTE (B850/B900/B1800/B2100/B2300/B2500/B2600)
LTE category2012
5G SupportYesNo

Sound

Speakers Stereo Mono
3.5 mm Jack No Yes
FM Radio No Yes
Dolby Atmos Yes No
Speaker Test
Max Volume
Samsung Galaxy Z Flip 4
86.3 dB
Xiaomi Redmi Note 9 Pro
87.1 dB

Other

Class Flagship Mid-range
Announced August, 2022 yr April, 2020 yr
Release Date August, 2022 yr May, 2020 yr
Launch Price ($) 999 185
Sensors - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included No n/a
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Samsung Galaxy Z Flip 4 the clear winner in this comparison.

Survey

Which smartphone would you pick?
0 (0%)
0 (0%)
Total Votes: 0

User comments

Share your opinion or ask questions below