Skip to content
InnoReviews

OPPO K15 vs Xiaomi 15 Ultra

OPPO K15
61.1Inno Score
VS
WINNER
Xiaomi 15 Ultra

Xiaomi

Xiaomi 15 Ultra

$1,499

75.9Inno Score
46.7Performance79.1
53.6Display69.1
58.6Camera73.2
79.8Battery79
86.7Features78.7
4 spec wins — OPPO K157 spec wins — Xiaomi 15 Ultra

InnoReviews verdict

Xiaomi 15 Ultra wins this phone face-off, 75.9 to 61.1, pulling ahead mainly in performance (+32) and display (+15). OPPO K15 still makes sense if its price or standout specs fit your needs better.

Which would you pick?

Key differences

Reasons to pick the OPPO K15

  • Stronger features score: 87 vs 79
  • 56% higher Front camera: 50 MP vs 32 MP
  • 48% higher capacity: 8,000 mAh vs 5,410 mAh
  • 11% lower thickness: 8.3 mm vs 9.4 mm

Reasons to pick the Xiaomi 15 Ultra

  • Stronger performance score: 79 vs 47
  • Stronger display score: 69 vs 54
  • Stronger camera score: 73 vs 59
  • 167% higher Peak brightness: 3,200 nits vs 1,200 nits
  • 33% higher RAM (max): 16 GB vs 12 GB

Display

Display comparison: OPPO K15 versus Xiaomi 15 Ultra
SpecOPPO K15Xiaomi 15 Ultra
Screen size6.59 ″6.73 ″+2%
Panel typeAMOLEDLTPO AMOLED
Resolution2760x12561440x3200
Pixel density460 ppi522 ppi+13%
Refresh rate120 Hz120 Hz
Peak brightness1,200 nits3,200 nits+167%
Screen-to-body88.9 %90 %+1%

Performance

Performance comparison: OPPO K15 versus Xiaomi 15 Ultra
SpecOPPO K15Xiaomi 15 Ultra
ChipsetDimensity 7360 SuperSnapdragon 8 Elite
AnTuTu—2,650,000
Geekbench 6 (single)—3,050Top 12%
Geekbench 6 (multi)—9,600Top 11%
RAM (max)12 GB16 GB+33%
Storage options256GB256/512GB/1TB
Storage typeUFS 3.1UFS 4.1

Camera

Camera comparison: OPPO K15 versus Xiaomi 15 Ultra
SpecOPPO K15Xiaomi 15 Ultra
Main camera50 MP50 MP
Main aperturef/1.8f/1.63
Ultra-wide50 MP50 MP
Telephoto—200 MP
Optical zoom—4.3 x
Max video4K@30fps8K@30fps
Front camera50 MP+56%32 MP
OISYesYes

Battery

Battery comparison: OPPO K15 versus Xiaomi 15 Ultra
SpecOPPO K15Xiaomi 15 Ultra
Capacity8,000 mAh+48%5,410 mAh
Wired charging80 W90 W+13%
Wireless charging—80 W
Active use endurance—12 h

Design

Design comparison: OPPO K15 versus Xiaomi 15 Ultra
SpecOPPO K15Xiaomi 15 Ultra
Weight205 g+9%226 g
Thickness8.3 mm+11%9.4 mm
IP ratingIP68/IP69IP68
Frame materialAluminumAluminum

Connectivity

Connectivity comparison: OPPO K15 versus Xiaomi 15 Ultra
SpecOPPO K15Xiaomi 15 Ultra
5GYesYes
Wi-FiWi-Fi 6Wi-Fi 7
Bluetooth5.46.0
NFCYesYes
USBUSB-C 2.0USB-C 3.2
eSIMNoYes

Software

Software comparison: OPPO K15 versus Xiaomi 15 Ultra
SpecOPPO K15Xiaomi 15 Ultra
OS at launchAndroid 16 (ColorOS 16)Android 15 (HyperOS 2)
OS update pledge—4 years

Audio

Audio comparison: OPPO K15 versus Xiaomi 15 Ultra
SpecOPPO K15Xiaomi 15 Ultra
Stereo speakersYesYes
3.5mm jackNoNo

Related comparisons

OPPO K15vs Huawei nova 15 ProVSOPPO K15vs Google Pixel 11 Pro FoldVSOPPO K15vs Infinix GT 50 ProVSOPPO K15vs Honor Magic V FlipVSXiaomi 15 Ultravs REDMI K80 ProVSXiaomi 15 Ultravs Samsung Galaxy S26 UltraVSXiaomi 15 Ultravs Honor 500 ProVSXiaomi 15 Ultravs Redmi K100 ProVS

Try another matchup