Home Phone comparison Samsung Galaxy S9 and Xiaomi Redmi 15 4G - Which is better?

Samsung Galaxy S9 vs Xiaomi Redmi 15 4G

47 out 100
Samsung Galaxy S9
VS
60 out 100
Xiaomi Redmi 15 4G
Samsung Galaxy S9
Xiaomi Redmi 15 4G

Compared 2 smartphones : Samsung Galaxy S9 Manufactured in March, 2018, with display 5.8 with chipsetSamsung Exynos 9 Octa 9810, vs Xiaomi Redmi 15 4G, Manufactured in August, 2025 with chipsetQualcomm Snapdragon 685. 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 Samsung Galaxy S9
  • Higher pixel density: 568ppi
  • Lighter design: 163g vs 224g
  • Supports newer USB: 3.1 vs 2
  • Supports Dolby Atmos
Reasons to choose Xiaomi Redmi 15 4G
  • Larger display: 6.9in
  • Higher refresh rate: 144Hz
  • Higher battery capacity: 7000mAh vs 3000mAh
  • Infrared port
  • Includes charger

Versions

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

Review

Key Specs Samsung Galaxy S9 and Xiaomi Redmi 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:
Samsung Galaxy S9
vs
Xiaomi Redmi 15 4G

Display

Display quality comparison
Type Super AMOLED IPS LCD
Size 5.8 in 6.9 in
Resolution 1440x2960 pixels 1080x2340 pixels
Aspect ratio 18.5:9 19.5:9
Pixel density 568 ppi 374 ppi
Refresh rate 60 Hz 144 Hz
Adaptive refresh rate No Yes
Max brightness 658 nits n/a
HDR support Yes HDR10 No
Screen-to-body ratio 84.1 % 83.1 %
Features Always-On Display n/a
Display test
Peak brightness (auto)
Samsung Galaxy S9
657 nits
Xiaomi Redmi 15 4G
n/a
PWM (Flicker)240 Hzn/a
Response time7 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Samsung Galaxy S9]

Design & Build

Design and ergonomics comparison
Height 147.7 mm (5.81 in) 171.1 mm (6.74 in)
Width 68.7 mm (2.7 in) 82.1 mm (3.23 in)
Thickness 8.5 mm (0.33 in) 8.6 mm (0.34 in)
Weight 163 g (5.75 oz) 224 g (7.9 oz)
Water resistance IP68 IP64
Back panel Glass Plastic
Frame Metal Plastic
Colors - Black
- Gold
- Gray
- Blue
- Purple		 - Black
- Gray
- Purple
Fingerprint sensor Yes rear Yes, In-Button
Screen-to-body ratio
Samsung Galaxy S9
84.1 %
Xiaomi Redmi 15 4G
83.1 %

Performance

Testing Samsung Galaxy S9 and Xiaomi Redmi 15 4G In benchmarks
Processor
Chipset Samsung Exynos 9 Octa 9810 Qualcomm Snapdragon 685
Max Frequency 2900 MHz 2800 MHz
CPU Cores 8 (4 + 4) 8 (4 + 4)
Architecture - 4/1.9 (Cortex-A55)
- 4/2.9 (Exynos M3)		 - 4/1.9 (Cortex-A53)
- 4/2.8 (Cortex-A73)
Process Samsung TSMC
Transistor Size 10 nm 6 nm
Neural Processor Yes Hexagon 686
Graphics Mali-G72 MP18 Adreno 610
GPU Cores 324 128
GPU Frequency 572 MHz 1260 MHz
FLOPS 370.6 GFLOPS 322.6 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy S9
734
Xiaomi Redmi 15 4G
475
Geekbench 6 (Multi-Core)
Samsung Galaxy S9
1894
Xiaomi Redmi 15 4G
1514
Geekbench 6 (Single-Core)734475
Geekbench 6 (Multi-Core)18941514
AnTuTu 10
AnTuTu 10
Samsung Galaxy S9
470496
Xiaomi Redmi 15 4G
380990
CPU137633114885
GPU16815557988
Memory86184103236
UX78524104881
NanoReview Score470496380990
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy S9
2272
Xiaomi Redmi 15 4G
n/a
Max Surface Temp.39.2 °Cn/a
Stability93 %n/a
Graphics Test13 fpsn/a
Graphics Score2272n/a
Sources: 3DMark [Samsung Galaxy S9]
PCMark 3.0
PCMark 3.0
Samsung Galaxy S9
6347
Xiaomi Redmi 15 4G
n/a
Writing score6325n/a
Web score5265n/a
Video editing5496n/a
Data manipulation5694n/a
NanoReview Score6347n/a

Memory

RAM
RAM Size 4 GB 6 GB
Memory Type LPDDR4X LPDDR4X
Memory Frequency 1794 MHz 2133 MHz
Channels 2 2
Storage
Storage Capacity64 GB128 GB
Storage TypeUFS 2.1UFS 2.2
Memory CardMicroSDMicroSD

Software

OS Android 8.0 (Upgradeable to Android 10) Android 15
OS Size 14 GB n/a
UI Skin One UI 2.5 HyperOS 2.0

Battery

Volume 3000 mAh 7000 mAh
Max Charging Power 15 W 33 W
Battery Type Li-Po n/a
Removable No No
Wireless Charging Yes Qi/PMA (10 W) No
Reverse Charging No No
Fast Charging Yes (40% in 30 min) Yes
Full Charge Time 1:35 h n/a
Battery Life Test
Battery Life
Samsung Galaxy S9
15:09
Xiaomi Redmi 15 4G
n/a
Web Browsing05:32 hn/a
Video Playback09:42 hn/a
Games03:45 hn/a
Standby Mode75 hn/a

Main camera

Matrix 12 MP 50 MP
Photo resolution 4000x3000 pixels n/a
Zoom Digital Digital
Flash Dual LED LED
Stabilization Optical Digital
8K Recording No No
4K Recording Yes (Up to 60 fps) No
1080p Recording Yes (Up to 240 fps) Yes (Up to 30 fps)
Slow Motion 960 fps (720p) n/a
Lenses count Standard: 12 MP Standard: 50 MP
Depth
Features - Bokeh effect
- Pro mode		 Bokeh effect
Main lens
Matrix12 MP50 MP
Aperturef/1.5 - 2.4f/1.8
Focal length26 mmn/a
SensorSamsung SAK2L3n/a
Sensor size1/2.55n/a
Pixel size1.4 μmn/a
AutofocusPhase autofocusPhase autofocus
StabilizationOpticalDigital
Main camera DxOMark results
Photo quality
Samsung Galaxy S9
104
Xiaomi Redmi 15 4G
n/a
Video quality
Samsung Galaxy S9
91
Xiaomi Redmi 15 4G
n/a
Overall camera score
Samsung Galaxy S9
99
Xiaomi Redmi 15 4G
n/a

Front camera

Matrix 8 MP 8 MP
Photo resolution 3264x2448 pixels n/a
Aperture f/1.7 f/2.0
Focal length 25 mm n/a
Sensor Samsung S5K3H1 n/a
Sensor size 1/3.6 n/a
Pixel size 1.22 μm n/a
Autofocus Phase autofocus (Dual Pixel) No
Stabilization Digital Digital
Video resolution 1440p 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		 - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5
Bluetooth features PBAP/PAB, PAN, OPP, MAP, LE, HSP, HID, HFP, DIP, AVRCP, A2DP LE
USB type USB Type-C USB Type-C
USB version 3.1 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
NFC* Yes Yes
Infrared Port No Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotYesNo
2G BandsGSM 850, GSM 900, GSM 1800, GSM 1900n/a
3G BandsHSDPA 850, HSDPA 900, HSDPA 1900, HSDPA 2100n/a
LTE Bands*LTE (B700/B800/B850/B900/B1700/B1800/B1900/B2100/B2300/B2500/B2600)n/a
LTE category18n/a
5G SupportNoNo

Sound

Speakers Stereo n/a
3.5 mm Jack Yes Yes
FM Radio No No
Dolby Atmos Yes n/a
Speaker Test
Max Volume
Samsung Galaxy S9
86 dB
Xiaomi Redmi 15 4G
n/a

Other

Class Flagship Budget
Announced February, 2018 yr August, 2025 yr
Release Date March, 2018 yr August, 2025 yr
Launch Price ($) 720 n/a
MSRP ($) n/a 150
Sensors - Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included n/a Yes, 33 W
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

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

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