Xiaomi 15 Ultra vs Samsung Galaxy S25 Ultra
The Xiaomi 15 Ultra scores 8.9 in our rating, and the Samsung Galaxy S25 Ultra scores 8.7. The Xiaomi 15 Ultra leads in display, camera and battery, while the Samsung Galaxy S25 Ultra is ahead in design and software support. The Xiaomi 15 Ultra is the newer phone, announced Feb 27, 2025.
Key differences
Why choose the Xiaomi 15 Ultra
- Bigger battery 5,410 mAh vs 5,000 mAh
- Faster wired charging 90 W vs 45 W
- Brighter screen 3,200 nits vs 2,600 nits
- Newer model Feb 27, 2025 vs Jan 22, 2025
- Faster wireless charging 80 W vs 15 W
- Higher screen resolution 1440 × 3200 px vs 1440 × 3120 px
Why choose the Samsung Galaxy S25 Ultra
- Bigger screen 6.9 inches vs 6.73 inches
- Longer optical zoom 5× vs 4.3×
- Longer OS update support 7 years vs 4 years
- Lighter 218 g vs 226 g
- Thinner 8.2 mm vs 9.35 mm
- Longer security updates 7 years vs 6 years
PhoneRanked scores
Calculated from specs, relative to phones from the same year and price range. How we rate phones
Value for money marked “est.” is an estimate: that phone has no official US launch price, so it is not highlighted against the others.
Spec
Xiaomi 15 UltraSamsung Galaxy S25 Ultra
Overall
8.9
8.7
Display
8.7
8.4
Performance
8.6
8.5
Camera
8.9
8.6
Battery
7.4
6.2
Design
8.1
8.8
Software support
7.4
9.2
Value for money
6.0 est.
5.5
Display
Spec
Xiaomi 15 UltraSamsung Galaxy S25 Ultra
Size
6.73 inches
6.9 inches
Type
OLED, WQHD+ AMOLED (All Around Liquid Display)
OLED, Dynamic AMOLED 2X
Resolution
1440 × 3200 px
1440 × 3120 px
Pixel density
522 ppi
498 ppi
Refresh rate
120 Hz
120 Hz
Adaptive refresh
✓ Yes
✓ Yes
Peak brightness
3,200 nits
2,600 nits
HDR
HDR10+, Dolby Vision
HDR10, HDR10+
Protection
Xiaomi Shield Glass 2.0
Corning Gorilla Armor 2
Performance
Spec
Xiaomi 15 UltraSamsung Galaxy S25 Ultra
Process
3 nm
3 nm
Max CPU clock
4.32 GHz
—
GPU
Adreno 830
Adreno 830
RAM
12 GB / 16 GB
12 GB / 16 GB
Storage
256 GB / 512 GB / 1 TB
256 GB / 512 GB / 1 TB
Storage type
UFS 4.1
UFS 4.0
microSD slot
✕ No
✕ No
Cameras
Spec
Xiaomi 15 UltraSamsung Galaxy S25 Ultra
Main camera
50 MP, f/1.63, 1"
200 MP, f/1.7, 1/1.3"
Optical stabilization
✓ Yes
✓ Yes
Ultrawide
50 MP
50 MP
Telephoto
200 MP, 4.3× optical, periscope
50 MP, 5× optical, periscope
Optical zoom
4.3×
5×
Rear cameras
4
4
Rear video
8K@30
8K@30
Front camera
32 MP
12 MP
Front video
4K@60
—
Battery and charging
Spec
Xiaomi 15 UltraSamsung Galaxy S25 Ultra
Capacity
5,410 mAh
5,000 mAh
Battery type
—
Li-Ion
Wired charging
90 W
45 W
Wireless charging
80 W
15 W
Reverse wireless
—
✓ Yes
Charger in box
✕ No
✕ No
Design and build
Spec
Xiaomi 15 UltraSamsung Galaxy S25 Ultra
Dimensions
161.3 × 75.3 × 9.35 mm
162.8 × 77.6 × 8.2 mm
Thickness
9.35 mm
8.2 mm
Weight
226 g
218 g
Form factor
Bar
Bar
Frame
Aluminum
Titanium
Back
Fiberglass
Glass
Water resistance
IP68
IP68
Fingerprint
Under-display ultrasonic
Under-display ultrasonic
3D face unlock
✕ No
✕ No
SIM
Dual Nano-SIM + eSIM
—
Colors
Silver Chrome, Black, White, Pine Green (China)
Titanium Silverblue, Titanium Black, Titanium Gray, Titanium Whitesilver, Titanium Jetblack, Titanium Jadegreen, Titanium Pinkgold
Connectivity and features
Spec
Xiaomi 15 UltraSamsung Galaxy S25 Ultra
5G
✓ Yes
✓ Yes
Wi-Fi
Wi-Fi 7
Wi-Fi 7
Bluetooth
6.0
5.4
USB
USB-C 3.x
USB-C 3.x
NFC
✓ Yes
✓ Yes
3.5 mm jack
✕ No
✕ No
Stereo speakers
✓ Yes
✓ Yes
Satellite
✕ No
✕ No
IR blaster
✓ Yes
✕ No
Software
Spec
Xiaomi 15 UltraSamsung Galaxy S25 Ultra
OS at launch
Android 15
Android 15
Interface
Xiaomi HyperOS 2
One UI 7
OS updates
4 years
7 years
Security updates
6 years
7 years
Launch and price
Spec
Xiaomi 15 UltraSamsung Galaxy S25 Ultra
Announced
Feb 27, 2025
Jan 22, 2025
Released
—
Feb 7, 2025
Status
Released
Released
US launch price
—
$1,299.99
Green marks the stronger value in a row. Specs come from official manufacturer data, cross-checked with established tech media; each phone page lists its sources. Report an error
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