Home Phone comparison Xiaomi 15 and OnePlus Ace 6 Ultra - Which is better?

Xiaomi 15 vs OnePlus Ace 6 Ultra

93 out 100
Xiaomi 15
VS
89 out 100
OnePlus Ace 6 Ultra
Xiaomi 15
OnePlus Ace 6 Ultra

Compared 2 smartphones : Xiaomi 15 Manufactured in October, 2024, with display 6.36 with chipsetQualcomm Snapdragon 8 Elite, vs OnePlus Ace 6 Ultra, Manufactured in April, 2026 with chipsetMediaTek Dimensity 9500. 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 Xiaomi 15
  • Higher pixel density: 460ppi
  • Lighter design: 191g vs 217g
  • Supports newer USB: 3.2 vs 2
  • Supports DisplayPort
  • Supports Dolby Atmos
  • Built-in eSIM
Reasons to choose OnePlus Ace 6 Ultra
  • Larger display: 6.78in
  • Higher refresh rate: 165Hz
  • Higher battery capacity: 8600mAh vs 5400mAh
  • Newer Bluetooth version: 6.0 vs 5.4

Versions

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

Review

Key Specs Xiaomi 15 and OnePlus Ace 6 Ultra
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:
Xiaomi 15
vs
OnePlus Ace 6 Ultra

Display

Display quality comparison
Type AMOLED AMOLED
Size 6.36 in 6.78 in
Resolution 1200x2670 pixels 1272x2772 pixels
Aspect ratio 20:9 19.5:9
Pixel density 460 ppi 450 ppi
Refresh rate 120 Hz 165 Hz
Adaptive refresh rate Yes (1-120 Hz) Yes
Max brightness 1500 nits 800 nits
HDR support Yes Dolby Vision Yes, Dolby Vision
Touch Sampling Rate 300 Hz 300 Hz
Screen-to-body ratio 90.1 % 89.7 %
Features - DCI-P3
- Always-On Display
- DC dimming		 - DCI-P3
- Always-On Display
- DC dimming
Display test
Peak brightness (auto)
Xiaomi 15
1508 nits
OnePlus Ace 6 Ultra
n/a
sRGB gamut99.5 %n/a
PWM (Flicker)120 Hzn/a
Response time1 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Xiaomi 15]

Design & Build

Design and ergonomics comparison
Height 152.3 mm (6 in) 162.5 mm (6.4 in)
Width 71.2 mm (2.8 in) 77.5 mm (3.05 in)
Thickness 8.08 mm (0.32 in) 8.5 mm (0.33 in)
Weight 191 g (6.74 oz) 217 g (7.65 oz)
Water resistance IP68 IP69
Cooling system Vapor chamber Vapor chamber
Back panel Glass Glass
Frame Metal Metal
Colors - White
- Black
- Silver
- Green
- Purple		 - Black
- Gray
Fingerprint sensor Yes In-Display Yes, In-Display
Screen-to-body ratio
Xiaomi 15
90.1 %
OnePlus Ace 6 Ultra
89.7 %

Performance

Testing Xiaomi 15 and OnePlus Ace 6 Ultra In benchmarks
Processor
Chipset Qualcomm Snapdragon 8 Elite MediaTek Dimensity 9500
Max Frequency 4320 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)
Xiaomi 15
2934
OnePlus Ace 6 Ultra
3600
Geekbench 6 (Multi-Core)
Xiaomi 15
8762
OnePlus Ace 6 Ultra
10616
Geekbench 6 (Single-Core)29343600
Geekbench 6 (Multi-Core)876210616
Geekbench Compute (GPU)24507n/a
Sources: Geekbench v6 [Xiaomi 15], [OnePlus Ace 6 Ultra]
AnTuTu 10
AnTuTu 10
Xiaomi 15
2620144
OnePlus Ace 6 Ultra
3429868
CPU5847251011104
GPU11423811311664
Memory519406383286
UX373632723814
NanoReview Score26201443429868
3DMark Wild Life
3DMark Wild Life
Xiaomi 15
20823
OnePlus Ace 6 Ultra
n/a
Sources: 3DMark [Xiaomi 15]
PCMark 3.0
PCMark 3.0
Xiaomi 15
18292
OnePlus Ace 6 Ultra
n/a
Writing score22508n/a
Web score18826n/a
Video editing8060n/a
Data manipulation14605n/a
NanoReview Score18292n/a

Memory

RAM
RAM Size - 12 GB
- 16 GB		 12 GB
Memory Type LPDDR5X LPDDR5X
Memory Frequency n/a 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 21 GB n/a
UI Skin HyperOS 2.0 ColorOS 16

Battery

Volume 5400 mAh 8600 mAh
Max Charging Power 90 W 120 W
Battery Type Silicon Carbon (Si/C) Silicon Carbon (Si/C)
Removable No No
Wireless Charging Yes (50 W) No
Reverse Charging Yes (Wireless) Yes
Fast Charging Yes (83% in 30 min) Yes
Full Charge Time 0:45 h n/a
Battery Life Test
Battery Life
Xiaomi 15
31:54
OnePlus Ace 6 Ultra
n/a
Web Browsing13:20 hn/a
Video Playback19:22 hn/a
Games07:10 hn/a
Standby Mode150 hn/a

Main camera

Matrix 50 MP 50 MP
Photo resolution 8192x6144 pixels 8192x6144 pixels
Zoom Optical, 2.6x Digital
Flash Dual LED Dual LED
Stabilization Optical Optical
8K Recording Yes (Up to 30 fps) No
4K Recording Yes (Up to 120 fps) Yes (Up to 120 fps)
1080p Recording Yes (Up to 60 fps) Yes (Up to 60 fps)
Slow Motion 1920 fps (720p) 240 fps (1080p)
Wide-angle lens 115 ° 112 °
Lenses count Standard: 50 MP
Telephoto: 50 MP
Ultra-wide: 50 MP		 Standard: 50 MP
Ultra-wide: 8 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
- RAW support
Main lens
Matrix50 MP50 MP
Aperturef/1.6f/1.8
Focal length23 mm23 mm
SensorOmniVision OVX9000 Light Fusion 900n/a
Sensor size1/1.311/1.55 (0.65)
Pixel size1.2 μm1 μm
AutofocusLaser autofocusPhase autofocus
StabilizationOpticalOptical
Telephoto
Matrix50 MPn/a
Aperturef/2.0n/a
Focal length60 mmn/a
SensorSamsung S5KJN5n/a
Sensor size1/2.76n/a
Pixel size0.64 μmn/a
StabilizationOpticaln/a
Ultra-wide lens
Matrix50 MP8 MP
Aperturef/2.2f/2.2
Focal length14 mm16 mm
SensorSamsung S5KJN1n/a
Sensor size1/2.76n/a
Pixel size0.64 μm1.12 μm
StabilizationDigitalDigital
Main camera DxOMark results
Photo quality
Xiaomi 15
150
OnePlus Ace 6 Ultra
n/a
Video quality
Xiaomi 15
133
OnePlus Ace 6 Ultra
n/a
Overall camera score
Xiaomi 15
147
OnePlus Ace 6 Ultra
n/a
Bokeh75n/a
Preview87n/a
Zoom152n/a
Sources: DxOMark [Xiaomi 15]

Front camera

Matrix 32 MP 16 MP
Photo resolution 6528x4896 pixels 4608x3456 pixels
Aperture f/2.0 f/2.4
Focal length 22 mm 23 mm
Sensor Omnivision OV32B n/a
Sensor size 1/3.14 1/3 (0.33)
Pixel size 0.7 μm n/a
Autofocus No 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 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 No
GPS - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
- NAVIC		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
NFC* Yes Yes
Infrared Port Yes Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *YesNo
Hybrid SlotNoNo
2G BandsGSM B2/B3/B5/B8n/a
3G BandsWCDMA B1/B2/B4/B5/B6/B8/B19n/a
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B17/B18/B19/B20/B26/B28/B34/B38/B39/B40/B41/B42/B48/B66)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
Xiaomi 15
91.3 dB
OnePlus Ace 6 Ultra
n/a

Other

Class Flagship Flagship
Announced October, 2024 yr April, 2026 yr
Release Date October, 2024 yr April, 2026 yr
Launch Price ($) 757 n/a
MSRP ($) n/a 555
Sensors - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included Yes 90 W Yes, 120 W
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

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