Home Phone comparison Samsung Galaxy S25 Ultra and Xiaomi Mi 9 - Which is better?

Samsung Galaxy S25 Ultra vs Xiaomi Mi 9

94 out 100
Samsung Galaxy S25 Ultra
VS
50 out 100
Xiaomi Mi 9
Samsung Galaxy S25 Ultra
Xiaomi Mi 9

Compared 2 smartphones : Samsung Galaxy S25 Ultra Manufactured in February, 2025, with display 6.9 with chipsetQualcomm Snapdragon 8 Elite, vs Xiaomi Mi 9, Manufactured in April, 2019with chipsetQualcomm Snapdragon 855. 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 S25 Ultra
  • Larger display: 6.9in
  • Higher pixel density: 498ppi
  • Higher refresh rate: 120Hz
  • Higher battery capacity: 5000mAh vs 3300mAh
  • Newer Bluetooth version: 5.4 vs 5
  • Supports newer USB: 3.2 vs 2
  • Supports DisplayPort
  • Supports Dolby Atmos
  • Built-in eSIM
Reasons to choose Xiaomi Mi 9
  • Lighter design: 173g vs 218g
  • Infrared port

Versions

Available versions and configurations
Memory Options - 12/256 GB
- 12/512 GB
- 12/1024 GB
- 16/1024 GB		 - 6/64 GB
- 6/128 GB
- 8/64 GB
- 8/128 GB
- 8/256 GB

Review

Key Specs Samsung Galaxy S25 Ultra and Xiaomi Mi 9
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:
Galaxy S25 Ultra
vs
Xiaomi Mi 9

Display

Display quality comparison
Type Dynamic AMOLED AMOLED
Size 6.9 in 6.39 in
Resolution 1440x3120 pixels 1080x2340 pixels
Aspect ratio 19.5:9 19.5:9
Pixel density 498 ppi 403 ppi
Refresh rate 120 Hz 60 Hz
Adaptive refresh rate Yes (1-120 Hz) No
Max brightness 2600 nits 600 nits
HDR support Yes HDR10+ Yes HDR10
Touch Sampling Rate 240 Hz n/a
Screen-to-body ratio 92.4 % 85.3 %
Features - DCI-P3
- Always-On Display
- DC dimming		 - Always-On Display
- DC dimming
Display test
Peak brightness (auto)
Samsung Galaxy S25 Ultra
1403 nits
Xiaomi Mi 9
619 nits
sRGB gamut97.7 %95.4 %
PWM (Flicker)240 Hz245 Hz
Response time1 ms4.2 ms
Contrast∞ Infinite∞ Infinite
Sources: NotebookCheck [Samsung Galaxy S25 Ultra], [Xiaomi Mi 9]

Design & Build

Design and ergonomics comparison
Height 162.8 mm (6.41 in) 157.5 mm (6.2 in)
Width 77.6 mm (3.06 in) 74.6 mm (2.94 in)
Thickness 8.2 mm (0.32 in) 7.6 mm (0.3 in)
Weight 218 g (7.69 oz) 173 g (6.1 oz)
Water resistance IP68 No
Cooling system Vapor chamber n/a
Back panel Glass Glass
Frame Metal Metal
Colors - Black
- Silver
- Gray
- Blue		 - Black
- Blue
- Purple
Fingerprint sensor Yes In-Display Yes In-Display
Screen-to-body ratio
Samsung Galaxy S25 Ultra
92.4 %
Xiaomi Mi 9
85.3 %

Performance

Testing Samsung Galaxy S25 Ultra and Xiaomi Mi 9 In benchmarks
Processor
Chipset Qualcomm Snapdragon 8 Elite Qualcomm Snapdragon 855
Max Frequency 4470 MHz 2840 MHz
CPU Cores 8 (2 + 6) 8 (1 + 3 + 4)
Architecture - 6/3.53 (Oryon (Phoenix M))
- 2/4.32 (Oryon (Phoenix L))		 - 4/1.8 (Cortex-A55 (Kryo 485 Silver))
- 3/2.42 (Cortex-A76 (Kryo 485 Gold))
- 1/2.84 (Cortex-A76 (Kryo 485 Gold))
Process TSMC TSMC
Transistor Size 3 nm 7 nm
Neural Processor Hexagon Hexagon 690
Graphics Adreno 830 Adreno 640
GPU Cores 1536 768
GPU Frequency 1100 MHz 585 MHz
FLOPS 3379.2 GFLOPS 898.5 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy S25 Ultra
3147
Xiaomi Mi 9
898
Geekbench 6 (Multi-Core)
Samsung Galaxy S25 Ultra
9750
Xiaomi Mi 9
2206
Geekbench 6 (Single-Core)3147898
Geekbench 6 (Multi-Core)97502206
Geekbench Compute (GPU)25681n/a
Sources: Geekbench v6 [Samsung Galaxy S25 Ultra]
AnTuTu 10
AnTuTu 10
Samsung Galaxy S25 Ultra
2795139
Xiaomi Mi 9
651041
CPU659871209300
GPU1294167191747
Memory471319113809
UX369782136185
NanoReview Score2795139651041
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy S25 Ultra
n/a
Xiaomi Mi 9
3100
Max Surface Temp.n/a35.6 °C
Stabilityn/a91 %
Graphics Testn/a18 fps
Graphics Scoren/a3100
Sources: 3DMark [Xiaomi Mi 9]
PCMark 3.0
PCMark 3.0
Samsung Galaxy S25 Ultra
n/a
Xiaomi Mi 9
10649
Writing scoren/a14618
Web scoren/a7084
Video editingn/a6715
Data manipulationn/a7931
NanoReview Scoren/a10649

Memory

RAM
RAM Size - 12 GB
- 16 GB		 6 GB
Memory Type LPDDR5X LPDDR4X
Memory Frequency 5333 MHz 2133 MHz
Channels 2 2
Storage
Storage Capacity- 256 GB
- 512 GB
- 1024 GB		128 GB
Storage TypeUFS 4.0UFS 2.1
Memory CardNoNo

Software

OS Android 15 Android 9.0 (Upgradeable to Android 11)
OS Size 30.4 GB 13.5 GB
UI Skin One UI 7.0 MIUI 12.5

Battery

Volume 5000 mAh 3300 mAh
Max Charging Power 45 W 27 W
Battery Type Li-ion Li-Po
Removable No No
Wireless Charging Yes (25 W) Yes (20 W)
Reverse Charging Yes (Wireless) No
Fast Charging Yes (72% in 30 min) Yes Quick Charge 4 (50% in 30 min)
Full Charge Time 0:59 h 1:30 h
Battery Life Test
Battery Life
Samsung Galaxy S25 Ultra
31:10
Xiaomi Mi 9
17:14
Web Browsing11:10 h06:08 h
Video Playback19:32 h11:37 h
Games06:22 h04:07 h
Standby Mode160 h83 h

Main camera

Matrix 200 MP 48 MP
Photo resolution 16320x12240 pixels 8000x6000 pixels
Zoom Optical, 5x Optical, 2x
Flash LED Dual LED
Stabilization Optical Digital
8K Recording Yes (Up to 30 fps) No
4K Recording Yes (Up to 120 fps) Yes (Up to 60 fps)
1080p Recording Yes (Up to 240 fps) Yes (Up to 60 fps)
Slow Motion 240 fps (1080p) 960 fps (1080p)
Wide-angle lens 120 ° 117 °
Lenses count Standard: 200 MP
Telephoto: 50 MP
Telephoto: 12 MP
Ultra-wide: 50 MP		 Standard: 48 MP
Telephoto: 12 MP
Ultra-wide: 16 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
- RAW support
Main lens
Matrix200 MP48 MP
Aperturef/1.7f/1.8
Focal length23 mm27 mm
SensorSamsung ISOCELL S5KHP2Sony IMX586
Sensor size1/1.31/2
Pixel size0.6 μm0.8 μm
AutofocusPhase autofocusLaser autofocus
StabilizationOpticalDigital
Telephoto
Matrix50 MP12 MP
Aperturef/3.4f/2.2
Focal length111 mm54 mm
SensorSony IMX854Samsung S5K3M5
Sensor size1/2.521/3.6
Pixel size0.7 μm1 μm
StabilizationOpticalDigital
Ultra-wide lens
Matrix50 MP16 MP
Aperturef/1.9f/2.2
Focal length13 mm13 mm
SensorSamsung ISOCELL S5KJN3Sony IMX481
Sensor size1/2.51/3.0
Pixel size0.7 μm1 μm
StabilizationDigitalDigital
Main camera DxOMark results
Photo quality
Samsung Galaxy S25 Ultra
144
Xiaomi Mi 9
112
Video quality
Samsung Galaxy S25 Ultra
143
Xiaomi Mi 9
99
Overall camera score
Samsung Galaxy S25 Ultra
146
Xiaomi Mi 9
107
Bokeh70n/a
Preview81n/a
Zoom149n/a
Sources: DxOMark [Samsung Galaxy S25 Ultra], [Xiaomi Mi 9]

Front camera

Matrix 12 MP 20 MP
Photo resolution 4000x3000 pixels 5184x3880 pixels
Aperture f/2.2 f/2.0
Focal length 26 mm 18 mm
Sensor Samsung S5K3LU CMOS
Sensor size 1/3.2 1/3
Pixel size 1.12 μm 0.9 μm
Autofocus Phase autofocus (Dual Pixel) 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 7 (802.11 a/b/g/n/ac/ax/be) 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 5.4 5
Bluetooth features LE LE, A2DP
USB type USB Type-C USB Type-C
USB version 3.2 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- USB-Host mode
- OTG
DisplayPort Yes DP 1.2 n/a
GPS - GPS
- GLONASS
- Beidou
- Galileo
- QZSS		 - GPS
- GLONASS
- Beidou
- Galileo
NFC* Yes Yes
Infrared Port No Yes
Connectivity
SIM Count*12
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *YesNo
Hybrid SlotNoNo
2G BandsGSM850, GSM900, DCS1800, PCS1900GSM 850, GSM 900, GSM 1800, GSM 1900
3G BandsUMTS B1(2100),B2(1900),B4(AWS),B5(850),B8(900)HSDPA 850, HSDPA 900, HSDPA 1900, HSDPA 2100
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B14/B18/B19/B20/B25/B26/B28/B29/B30/B66/B71)LTE (B800/B900/B1800/B2100/B2300/B2500/B2600)
LTE categoryn/a20
5G SupportYesNo

Sound

Speakers Stereo Mono
3.5 mm Jack No No
FM Radio No No
Dolby Atmos Yes No
Speaker Test
Max Volume
Samsung Galaxy S25 Ultra
93 dB
Xiaomi Mi 9
87.1 dB

Other

Class Flagship Flagship
Announced January, 2025 yr February, 2019 yr
Release Date February, 2025 yr April, 2019 yr
Launch Price ($) 1299 460
Sensors - Hall Sensor
- Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Hall Sensor
- Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included No n/a

Note

Samsung Galaxy S25 Ultra:

Supports up to 2 eSIMs. The international model has 2 physical SIM slots, while the U.S. version has 1.","Uses Grade 5 titanium and Corning Gorilla Armor 2 glass on both sides.

* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Samsung Galaxy S25 Ultra the clear winner in this comparison.

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