Home Phone comparison Samsung Galaxy S25 Ultra and Vivo iQOO 15T - Which is better?

Samsung Galaxy S25 Ultra vs Vivo iQOO 15T

94 out 100
Samsung Galaxy S25 Ultra
VS
91 out 100
Vivo iQOO 15T
Samsung Galaxy S25 Ultra
Vivo iQOO 15T

Compared 2 smartphones : Samsung Galaxy S25 Ultra Manufactured in February, 2025, with display 6.9 with chipsetQualcomm Snapdragon 8 Elite, vs Vivo iQOO 15T, Manufactured in May, 2026with chipsetMediaTek Dimensity 9500 Monster. 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
  • Supports newer USB: 3.2 vs 2
  • Supports DisplayPort
  • Supports Dolby Atmos
  • Built-in eSIM
Reasons to choose Vivo iQOO 15T
  • Higher pixel density: 510ppi
  • Higher refresh rate: 144Hz
  • Lighter design: 216g vs 218g
  • Higher battery capacity: 8000mAh vs 5000mAh
  • Newer Bluetooth version: 6.0 vs 5.4
  • Infrared port
  • Includes charger

Versions

Available versions and configurations
Memory Options - 12/256 GB
- 12/512 GB
- 12/1024 GB
- 16/1024 GB		 - 12/256 GB
- 12/512 GB
- 16/256 GB
- 16/512 GB
- 16/1024 GB

Review

Key Specs Samsung Galaxy S25 Ultra and Vivo iQOO 15T
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
Vivo iQOO 15T

Display

Display quality comparison
Type Dynamic AMOLED AMOLED
Size 6.9 in 6.82 in
Resolution 1440x3120 pixels 1440x3168 pixels
Aspect ratio 19.5:9 20:9
Pixel density 498 ppi 510 ppi
Refresh rate 120 Hz 144 Hz
Adaptive refresh rate Yes (1-120 Hz) Yes
Max brightness 2600 nits 1800 nits
HDR support Yes HDR10+ Yes, Dolby Vision
Touch Sampling Rate 240 Hz 300 Hz
Screen-to-body ratio 92.4 % 89.6 %
Features - DCI-P3
- Always-On Display
- DC dimming		 - DCI-P3
- Always-On Display
- DC dimming
Display test
Peak brightness (auto)
Samsung Galaxy S25 Ultra
1403 nits
Vivo iQOO 15T
n/a
sRGB gamut97.7 %n/a
PWM (Flicker)240 Hzn/a
Response time1 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Samsung Galaxy S25 Ultra]

Design & Build

Design and ergonomics comparison
Height 162.8 mm (6.41 in) 163.4 mm (6.43 in)
Width 77.6 mm (3.06 in) 76.7 mm (3.02 in)
Thickness 8.2 mm (0.32 in) 8.3 mm (0.33 in)
Weight 218 g (7.69 oz) 216 g (7.62 oz)
Water resistance IP68 IP69
Cooling system Vapor chamber Vapor chamber
Back panel Glass Glass
Frame Metal Metal
Colors - Black
- Silver
- Gray
- Blue		 - White
- Black
- Blue
- Purple
Fingerprint sensor Yes In-Display Yes, In-Display
Screen-to-body ratio
Samsung Galaxy S25 Ultra
92.4 %
Vivo iQOO 15T
89.6 %

Performance

Testing Samsung Galaxy S25 Ultra and Vivo iQOO 15T In benchmarks
Processor
Chipset Qualcomm Snapdragon 8 Elite MediaTek Dimensity 9500 Monster
Max Frequency 4470 MHz 4210 MHz
CPU Cores 8 (2 + 6) 8 (1 + 3 + 4)
Architecture - 6/3.53 (Oryon (Phoenix M))
- 2/4.32 (Oryon (Phoenix L))		 - 4/2.7 (C1-Pro)
- 3/3.5 (C1-Premium)
- 1/4.21 (C1-Ultra)
Process TSMC TSMC
Transistor Size 3 nm 3 nm
Neural Processor Hexagon MediaTek NPU 990
Graphics Adreno 830 n/a
GPU Cores 1536 n/a
GPU Frequency 1100 MHz n/a
FLOPS 3379.2 GFLOPS n/a
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy S25 Ultra
3147
Vivo iQOO 15T
3507
Geekbench 6 (Multi-Core)
Samsung Galaxy S25 Ultra
9750
Vivo iQOO 15T
10634
Geekbench 6 (Single-Core)31473507
Geekbench 6 (Multi-Core)975010634
Geekbench Compute (GPU)25681n/a
Sources: Geekbench v6 [Samsung Galaxy S25 Ultra], [Vivo iQOO 15T]
AnTuTu 10
AnTuTu 10
Samsung Galaxy S25 Ultra
2795139
Vivo iQOO 15T
3815522
CPU6598711006840
GPU12941671438159
Memory471319553590
UX369782816933
NanoReview Score27951393815522

Memory

RAM
RAM Size - 12 GB
- 16 GB		 12 GB
Memory Type LPDDR5X LPDDR5X
Memory Frequency 5333 MHz 5333 MHz
Channels 2 4
Storage
Storage Capacity- 256 GB
- 512 GB
- 1024 GB		256 GB
Storage TypeUFS 4.0UFS 4.1
Memory CardNoNo

Software

OS Android 15 Android 16
OS Size 30.4 GB n/a
UI Skin One UI 7.0 OriginOS 6

Battery

Volume 5000 mAh 8000 mAh
Max Charging Power 45 W 100 W
Battery Type Li-ion Silicon Carbon (Si/C)
Removable No No
Wireless Charging Yes (25 W) No
Reverse Charging Yes (Wireless) Yes
Fast Charging Yes (72% in 30 min) Yes
Full Charge Time 0:59 h n/a
Battery Life Test
Battery Life
Samsung Galaxy S25 Ultra
31:10
Vivo iQOO 15T
n/a
Web Browsing11:10 hn/a
Video Playback19:32 hn/a
Games06:22 hn/a
Standby Mode160 hn/a

Main camera

Matrix 200 MP 200 MP
Photo resolution 16320x12240 pixels 16320x12288 pixels
Zoom Optical, 5x Digital
Flash LED Dual LED
Stabilization Optical Optical
8K Recording Yes (Up to 30 fps) Yes (Up to 30 fps)
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) 240 fps (1080p)
Wide-angle lens 120 ° n/a
Lenses count Standard: 200 MP
Telephoto: 50 MP
Telephoto: 12 MP
Ultra-wide: 50 MP		 Standard: 200 MP
Ultra-wide: 50 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
Main lens
Matrix200 MP200 MP
Aperturef/1.7f/1.9
Focal length23 mmn/a
SensorSamsung ISOCELL S5KHP2n/a
Sensor size1/1.31/1.56 (0.64)
Pixel size0.6 μm0.5 μm
AutofocusPhase autofocusLaser autofocus
StabilizationOpticalOptical
Telephoto
Matrix50 MPn/a
Aperturef/3.4n/a
Focal length111 mmn/a
SensorSony IMX854n/a
Sensor size1/2.52n/a
Pixel size0.7 μmn/a
StabilizationOpticaln/a
Ultra-wide lens
Matrix50 MP50 MP
Aperturef/1.9f/2.0
Focal length13 mm15 mm
SensorSamsung ISOCELL S5KJN3Samsung S5KJN5
Sensor size1/2.51/2.76 (0.36)
Pixel size0.7 μm0.64 μm
StabilizationDigitalDigital
Main camera DxOMark results
Photo quality
Samsung Galaxy S25 Ultra
144
Vivo iQOO 15T
n/a
Video quality
Samsung Galaxy S25 Ultra
143
Vivo iQOO 15T
n/a
Overall camera score
Samsung Galaxy S25 Ultra
146
Vivo iQOO 15T
n/a
Bokeh70n/a
Preview81n/a
Zoom149n/a
Sources: DxOMark [Samsung Galaxy S25 Ultra]

Front camera

Matrix 12 MP 16 MP
Photo resolution 4000x3000 pixels n/a
Aperture f/2.2 f/2.5
Focal length 26 mm n/a
Sensor Samsung S5K3LU n/a
Sensor size 1/3.2 n/a
Pixel size 1.12 μm n/a
Autofocus Phase autofocus (Dual Pixel) Phase autofocus
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 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 version 5.4 6.0
Bluetooth features LE LE
USB type USB Type-C USB Type-C
USB version 3.2 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort Yes DP 1.2 No
GPS - GPS
- GLONASS
- Beidou
- Galileo
- QZSS		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
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, PCS1900n/a
3G BandsUMTS B1(2100),B2(1900),B4(AWS),B5(850),B8(900)n/a
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B14/B18/B19/B20/B25/B26/B28/B29/B30/B66/B71)n/a
5G SupportYesYes

Sound

Speakers Stereo n/a
3.5 mm Jack No No
FM Radio No No
Dolby Atmos Yes No
Speaker Test
Max Volume
Samsung Galaxy S25 Ultra
93 dB
Vivo iQOO 15T
n/a

Other

Class Flagship Flagship
Announced January, 2025 yr May, 2026 yr
Release Date February, 2025 yr May, 2026 yr
Launch Price ($) 1299 n/a
MSRP ($) n/a 560
Sensors - Hall Sensor
- Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included No Yes, 100 W

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

No clear favorite identified yet; updates may follow as new data arrives.

Survey

Which smartphone would you pick?
0 (0%)
0 (0%)
Total Votes: 0

User comments

Share your opinion or ask questions below