Home Phone comparison Xiaomi Mi 9 and Xiaomi Redmi Note 15 4G - Which is better?

Xiaomi Mi 9 vs Xiaomi Redmi Note 15 4G

50 out 100
Xiaomi Mi 9
VS
64 out 100
Xiaomi Redmi Note 15 4G
Xiaomi Mi 9
Xiaomi Redmi Note 15 4G

Compared 2 smartphones : Xiaomi Mi 9 Manufactured in April, 2019, with display 6.39 with chipsetQualcomm Snapdragon 855, vs Xiaomi Redmi Note 15 4G, Manufactured in December, 2025 with chipsetMediaTek Helio G100 Ultra. 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 Mi 9
  • Higher pixel density: 403ppi
  • Lighter design: 173g vs 183.7g
  • Infrared port
Reasons to choose Xiaomi Redmi Note 15 4G
  • Larger display: 6.77in
  • Higher refresh rate: 120Hz
  • Higher battery capacity: 6000mAh vs 3300mAh
  • Newer Bluetooth version: 5.3 vs 5

Versions

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

Review

Key Specs Xiaomi Mi 9 and Xiaomi Redmi Note 15 4G
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
Smartphones:
Xiaomi Mi 9
vs
Redmi Note 15 4G

Display

Display quality comparison
Type AMOLED AMOLED
Size 6.39 in 6.77 in
Resolution 1080x2340 pixels 1080x2340 pixels
Aspect ratio 19.5:9 n/a
Pixel density 403 ppi 388 ppi
Refresh rate 60 Hz 120 Hz
Adaptive refresh rate No Yes (60-120 Hz)
Max brightness 600 nits n/a
HDR support Yes HDR10 No
Screen-to-body ratio 85.3 % 89.7 %
Features - Always-On Display
- DC dimming		 DCI-P3
Display test
Peak brightness (auto)
Xiaomi Mi 9
619 nits
Xiaomi Redmi Note 15 4G
n/a
sRGB gamut95.4 %n/a
PWM (Flicker)245 Hzn/a
Response time4.2 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Xiaomi Mi 9]

Design & Build

Design and ergonomics comparison
Height 157.5 mm (6.2 in) 164 mm (6.46 in)
Width 74.6 mm (2.94 in) 75.4 mm (2.97 in)
Thickness 7.6 mm (0.3 in) 7.4 mm (0.29 in)
Weight 173 g (6.1 oz) 183.7 g (6.48 oz)
Water resistance No IP64
Back panel Glass Plastic
Frame Metal Plastic
Colors - Black
- Blue
- Purple		 - Black
- Blue
- Green
- Purple
Fingerprint sensor Yes In-Display Yes, In-Display
Screen-to-body ratio
Xiaomi Mi 9
85.3 %
Xiaomi Redmi Note 15 4G
89.7 %

Performance

Testing Xiaomi Mi 9 and Xiaomi Redmi Note 15 4G In benchmarks
Processor
Chipset Qualcomm Snapdragon 855 MediaTek Helio G100 Ultra
Max Frequency 2840 MHz 2200 MHz
CPU Cores 8 (1 + 3 + 4) 8 (2 + 6)
Architecture - 4/1.8 (Cortex-A55 (Kryo 485 Silver))
- 3/2.42 (Cortex-A76 (Kryo 485 Gold))
- 1/2.84 (Cortex-A76 (Kryo 485 Gold))		 - 6/2 (Cortex-A55)
- 2/2.2 (Cortex-A76)
Process TSMC TSMC
Transistor Size 7 nm 6 nm
Neural Processor Hexagon 690 Yes
Graphics Adreno 640 Mali-G57 MP2
GPU Cores 768 64
GPU Frequency 585 MHz 1000 MHz
FLOPS 898.5 GFLOPS 128 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Xiaomi Mi 9
898
Xiaomi Redmi Note 15 4G
730
Geekbench 6 (Multi-Core)
Xiaomi Mi 9
2206
Xiaomi Redmi Note 15 4G
2025
Geekbench 6 (Single-Core)898730
Geekbench 6 (Multi-Core)22062025
AnTuTu 10
AnTuTu 10
Xiaomi Mi 9
651041
Xiaomi Redmi Note 15 4G
437184
CPU209300132724
GPU19174772238
Memory113809109980
UX136185122242
NanoReview Score651041437184
3DMark Wild Life
3DMark Wild Life
Xiaomi Mi 9
3100
Xiaomi Redmi Note 15 4G
n/a
Max Surface Temp.35.6 °Cn/a
Stability91 %n/a
Graphics Test18 fpsn/a
Graphics Score3100n/a
Sources: 3DMark [Xiaomi Mi 9]
PCMark 3.0
PCMark 3.0
Xiaomi Mi 9
10649
Xiaomi Redmi Note 15 4G
n/a
Writing score14618n/a
Web score7084n/a
Video editing6715n/a
Data manipulation7931n/a
NanoReview Score10649n/a

Memory

RAM
RAM Size 6 GB 6 GB
Memory Type LPDDR4X LPDDR4X
Memory Frequency 2133 MHz 2133 MHz
Channels 2 2
Storage
Storage Capacity128 GB128 GB
Storage TypeUFS 2.1UFS 2.2
Memory CardNoNo

Software

OS Android 9.0 (Upgradeable to Android 11) Android 15
OS Size 13.5 GB n/a
UI Skin MIUI 12.5 HyperOS 2.0

Battery

Volume 3300 mAh 6000 mAh
Max Charging Power 27 W 33 W
Battery Type Li-Po Silicon Carbon (Si/C)
Removable No No
Wireless Charging Yes (20 W) No
Reverse Charging No Yes
Fast Charging Yes Quick Charge 4 (50% in 30 min) Yes
Full Charge Time 1:30 h n/a
Battery Life Test
Battery Life
Xiaomi Mi 9
17:14
Xiaomi Redmi Note 15 4G
n/a
Web Browsing06:08 hn/a
Video Playback11:37 hn/a
Games04:07 hn/a
Standby Mode83 hn/a

Main camera

Matrix 48 MP 108 MP
Photo resolution 8000x6000 pixels n/a
Zoom Optical, 2x Digital
Flash Dual LED LED
Stabilization Digital Digital
8K Recording No No
4K Recording Yes (Up to 60 fps) No
1080p Recording Yes (Up to 60 fps) Yes (Up to 30 fps)
Slow Motion 960 fps (1080p) n/a
Wide-angle lens 117 ° n/a
Lenses count Standard: 48 MP
Telephoto: 12 MP
Ultra-wide: 16 MP		 Standard: 108 MP
Depth: 2 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
Main lens
Matrix48 MP108 MP
Aperturef/1.8f/1.7
Focal length27 mm24 mm
SensorSony IMX586n/a
Sensor size1/21/1.67 (0.6)
Pixel size0.8 μm0.64 μm
AutofocusLaser autofocusPhase autofocus
StabilizationDigitalDigital
Telephoto
Matrix12 MPn/a
Aperturef/2.2n/a
Focal length54 mmn/a
SensorSamsung S5K3M5n/a
Sensor size1/3.6n/a
Pixel size1 μmn/a
StabilizationDigitaln/a
Ultra-wide lens
Matrix16 MPn/a
Aperturef/2.2n/a
Focal length13 mmn/a
SensorSony IMX481n/a
Sensor size1/3.0n/a
Pixel size1 μmn/a
StabilizationDigitaln/a
Main camera DxOMark results
Photo quality
Xiaomi Mi 9
112
Xiaomi Redmi Note 15 4G
n/a
Video quality
Xiaomi Mi 9
99
Xiaomi Redmi Note 15 4G
n/a
Overall camera score
Xiaomi Mi 9
107
Xiaomi Redmi Note 15 4G
n/a
Sources: DxOMark [Xiaomi Mi 9]

Front camera

Matrix 20 MP 20 MP
Photo resolution 5184x3880 pixels n/a
Aperture f/2.0 f/2.2
Focal length 18 mm n/a
Sensor CMOS Omnivision OV02F
Sensor size 1/3 1/5 (0.2)
Pixel size 0.9 μm 1.75 μm
Autofocus No No
Stabilization Digital Digital
Video resolution 1080p (Full HD) at 30 fps 1080p (Full HD) at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 5 (802.11 a/b/g/n/ac) Wi-Fi 5 (802.11 a/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 5.3
Bluetooth features LE, A2DP LE
USB type USB Type-C USB Type-C
USB version 2 2
USB features - Charging
- USB Storage Mode
- USB-Host mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort n/a No
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
NFC* Yes Varies by region
Infrared Port Yes No
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotNoNo
2G BandsGSM 850, GSM 900, GSM 1800, GSM 1900n/a
3G BandsHSDPA 850, HSDPA 900, HSDPA 1900, HSDPA 2100n/a
LTE Bands*LTE (B800/B900/B1800/B2100/B2300/B2500/B2600)n/a
LTE category20n/a
5G SupportNoNo

Sound

Speakers Mono n/a
3.5 mm Jack No No
FM Radio No Yes
Dolby Atmos No n/a
Speaker Test
Max Volume
Xiaomi Mi 9
87.1 dB
Xiaomi Redmi Note 15 4G
n/a

Other

Class Flagship Mid-range
Announced February, 2019 yr December, 2025 yr
Release Date April, 2019 yr December, 2025 yr
Launch Price ($) 460 n/a
Sensors - Hall Sensor
- Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Xiaomi Redmi Note 15 4G the clear winner in this comparison.

Survey

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