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Xiaomi 15 Ultra vs Samsung Galaxy S25 Ultra

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Xiaomi 15 Ultra vs Samsung Galaxy S25 Ultra

95 out of 100
Xiaomi 15 Ultra
VS
94 out of 100
Samsung Galaxy S25 Ultra
Xiaomi 15 Ultra
Samsung Galaxy S25 Ultra

Here we compared two flagship smartphones: the 6.73-inch Xiaomi 15 Ultra (with Qualcomm Snapdragon 8 Elite) that was released on February 27, 2025, against the Samsung Galaxy S25 Ultra, which is powered by the same chip and came out 1 month before. On this page, you will find tests, full specs, strengths, and weaknesses of each of the devices.

  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery life
  6. Camera
  7. Comments

Key differences

An overview of the main advantages of each smartphone
Reasons to consider the Xiaomi 15 Ultra
  • Comes with 1000 mAh larger battery capacity: 6000 vs 5000 mAh
  • Newer Bluetooth version (v6.0)
  • Supports higher wattage charging (90W versus 45W)
  • Slow-motion recording at 1920FPS
  • Has 2 SIM card slots
  • Faster storage type - UFS 4.1 versus UFS 4.0
  • Has a built-in infrared port
Reasons to consider the Samsung Galaxy S25 Ultra
  • The rear camera has a 5x optical zoom

Review

Evaluation of Xiaomi 15 Ultra and Samsung Galaxy S25 Ultra crucial features
Display
Screen quality, color accuracy, brightness
Camera
Photo and video recording quality
Performance
CPU and memory performance (apps, system)
Gaming
Capabilities for playing modern games
Battery
Battery life, charging type and speed
Connectivity
Networks, ports, data transmission
Scores with a red asterisk (*) are approximate and may change in the future as we gather more data.
NanoReview Score
Final comparison evaluation
Choose the importance of each parameter to more accurately identify the smartphone that best meets your particular needs.

Tests and specifications

Comparison table of technical specifications and tests
Phone:
15 Ultra
vs
Galaxy S25 Ultra

Display

TypeAMOLEDDynamic AMOLED
Size6.73 inches6.9 inches
Resolution1440 x 3200 pixels1440 x 3120 pixels
Aspect ratio20:919.5:9
PPI522 ppi498 ppi
Refresh rate120 Hz120 Hz
Adaptive refresh rateYes (1-120 Hz)Yes (1-120 Hz)
Max rated brightness - 2600 nits
Max rated brightness in HDR3200 nits -
HDR supportYes, Dolby VisionYes, HDR10+
Touch sampling rate300 Hz240 Hz
Screen protectionXiaomi Shield Glass 2.0Corning Gorilla Armor 2
Screen-to-body ratio90%92.4%
Display features - DCI-P3
- Always-On Display
- DC Dimming		 - DCI-P3
- Always-On Display
- DC Dimming
Peak brightness test (auto)

Design and build

Height161.3 mm (6.35 inches)162.8 mm (6.41 inches)
Width75.3 mm (2.96 inches)77.6 mm (3.06 inches)
Thickness9.35 mm (0.37 inches)8.2 mm (0.32 inches)
Weight226 g (7.97 oz)218 g (7.69 oz)
WaterproofIP68IP68
Advanced coolingVapor chamberVapor chamber
Rear materialGlassGlass
Frame materialMetalMetal
ColorsWhite, Black, Silver, GreenBlack, Silver, Gray, Blue
Fingerprint scannerYes, in-displayYes, in-display
Screen-to-body ratio

Performance

Tests of Xiaomi 15 Ultra and Samsung Galaxy S25 Ultra in the benchmarks
SoC
ChipsetQualcomm Snapdragon 8 EliteQualcomm Snapdragon 8 Elite
Max clock4320 MHz4470 MHz
CPU cores8 (2 + 6)8 (2 + 6)
Architecture- 6 cores at 3.53 GHz: Oryon (Phoenix M)
- 2 cores at 4.32 GHz: Oryon (Phoenix L)		- 6 cores at 3.53 GHz: Oryon (Phoenix M)
- 2 cores at 4.32 GHz: Oryon (Phoenix L)
ManufacturingTSMCTSMC
Lithography process3 nanometers3 nanometers
Neural processor (NPU)HexagonHexagon
GraphicsAdreno 830Adreno 830
GPU shading units15361536
GPU clock1100 MHz1100 MHz
FLOPS~3379.2 GFLOPS~3379.2 GFLOPS

Benchmarks

Geekbench 6 (Single-Core)
Geekbench 6 (Multi-Core)
Geekbench Compute (GPU) - 25681
Single-core score30083147
Multi-core score90659750
AnTuTu Benchmark 10
15 Ultra
2742399
Galaxy S25 Ultra+2%
2795139
CPU604150659871
GPU11629631294167
Memory541237471319
UX434049369782
Total score27423992795139
SamplesLess than 3[4 tests]

Memory

RAM
RAM size12, 16 GB12, 16 GB
Memory typeLPDDR5XLPDDR5X
Memory clock5333 MHz5333 MHz
Channels22
Storage
Storage size256, 512, 1024 GB256, 512, 1024 GB
Storage typeUFS 4.1UFS 4.0
Memory cardNoNo

Software

Operating systemAndroid 15 Android 15
ROMHyperOS 2.0One UI 7.0
OS size - 30.4 GB

Battery

Capacity6000 mAh5000 mAh
Max charge power90 W45 W
Battery typeSilicon-Carbon (Si/C)Li-Ion
ReplaceableNoNo
Wireless chargingYes (80 W)Yes (25 W)
Reverse chargingYes, (wireless)Yes, (wireless)
Fast chargingYes Yes (72% in 30 min)
Full charging time - 0:59 hr
Battery life tests
Web browsing - 08:35 hr
Watching video - 16:40 hr
Gaming - 06:40 hr
Standby - 165 hr
General battery life

Main camera

Matrix50 megapixels200 megapixels
Image resolution8192 x 614416320 x 12240
ZoomOptical, 4.3xOptical, 5x
FlashDual LEDLED
StabilizationOpticalOptical
8K video recordingUp to 30FPSUp to 30FPS
4K video recordingUp to 120FPSUp to 120FPS
1080p video recordingUp to 60FPSUp to 240FPS
Slow motion1920 FPS (1080p)240 FPS (1080p)
Angle of widest lens115°120°
Lenses1) Standard: 50 MP
2) Telephoto: 50 MP
3) Telephoto: 200 MP
4) Ultrawide: 50 MP
5) Depth
1) Standard: 200 MP
2) Telephoto: 50 MP
3) Telephoto: 12 MP
4) Ultrawide: 50 MP
Camera features - Bokeh mode
- Pro mode
- RAW support		 - Bokeh mode
- Pro mode
- RAW support
Standard lens
Image resolution50 MP200 MP
Aperturef/1.6f/1.7
Focal length23 mm23 mm
SensorSony LYT-900Samsung ISOCELL S5KHP2
Sensor size1/1.0"1/1.3"
Pixel size1.6 micron0.6 micron
AutofocusLaser autofocusPhase autofocus
StabilizationOpticalOptical
Telephoto lens
Image resolution50 MP50 MP
Aperturef/1.8f/3.4
Focal length70 mm111 mm
SensorSony IMX858Sony IMX854
Sensor size1/2.51"1/2.52"
Pixel size0.7 micron0.7 micron
StabilizationOpticalOptical
Ultra-wide lens
Image resolution50 MP50 MP
Aperturef/2.2f/1.9
Focal length14 mm13 mm
SensorSamsung S5KJN5Samsung ISOCELL S5KJN3
Sensor size1/2.76"1/2.5"
Pixel size0.64 micron0.7 micron
StabilizationDigitalDigital

Selfie camera

Megapixels32 megapixels12 megapixels
Image resolution6528 x 48964000 x 3000
Aperturef/2.0f/2.2
Focal length21 mm26 mm
SensorOmnivision OV32BSamsung S5K3LU
Sensor size1/3.14"1/3.2"
Pixel size0.7 micron1.12 micron
Autofocus - Phase autofocus (Dual Pixel)
StabilizationDigitalDigital
Video resolution2160p (4K) at 60 FPS2160p (4K) at 60 FPS
Depth sensor (TOF 3D)NoNo

Connectivity

Wi-Fi standardWi-Fi 7 (802.11 a/b/g/n/ac/ax/be)Wi-Fi 7 (802.11 a/b/g/n/ac/ax/be)
Wi-Fi features - Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display		 - Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version6.05.4
Bluetooth featuresLELE
USB typeUSB Type-CUSB Type-C
USB version3.23.2
USB features - Charging
- USB-Storage mode
- OTG		 - Charging
- USB-Storage mode
- OTG
DisplayPortYesYes, DP 1.2
GPSGPS, GLONASS, Beidou, Galileo, QZSS, NAVICGPS, GLONASS, Beidou, Galileo, QZSS
NFC*YesYes
Infrared portYesNo
Network
Number of SIM*21
Type of SIM cardNanoNano
Multi SIM modeStandbyStandby
eSIM support*YesYes
Hybrid slotNoNo
5G supportYesYes

Sound

SpeakersStereoStereo
Headphone audio jackNoNo
FM radioNoNo
Dolby AtmosYesYes

Other

CategoryFlagshipFlagship
AnnouncedFebruary 2025January 2025
Release dateFebruary 2025February 2025
Launch price$900$1299
SAR (head) - 1.25 W/kg
SAR (body) - 1.42 W/kg
Sensors - Barometer
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint		 - Hall-effect sensor
- Barometer
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
Bundled chargerYes, 90 WNot included
Further details
Notes on 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.
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.
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