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X300 Pro vs 15 Ultra

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Higher score

vivo

X300 Pro

No price yet
5 spec wins

Quick verdict

  • X300 Pro is better for battery life.
  • X300 Pro leads on display.
  • X300 Pro leads on camera.
  • X300 Pro leads on battery.
  • X300 Pro leads on build.
  • X300 Pro has the higher Comparezi Score (60.9).

Computed from stored specifications, the published phones scoring rules and recorded prices. Not an opinion.

Winners by area

Display X300 Pro
Camera X300 Pro
Battery X300 Pro
Build X300 Pro

Specifications side by side

Spec
X300 Pro
15 Ultra
Display
Display size
6.78" (better)
6.73"
Display type
AMOLED
AMOLED
Resolution
2800 x 1260
3200 x 1440
Refresh rate
120 Hz
120 Hz
Peak brightness
4,500 nits (better)
3,200 nits
Brightness measured as
Local peak, small bright area
Multi-scenario peak
Performance
Processor
MediaTek Dimensity 9500
Snapdragon 8 Elite Mobile Platform
Chipset process
3 nm
3 nm
RAM
16 GB
16 GB
Storage
512 GB
512 GB
Memory options
16 GB + 512 GB
16 GB + 512 GB
Camera
Main camera
50 MP
50 MP
Ultra-wide camera
50 MP
50 MP
Telephoto camera
200 MP
200 MP
Front camera
50 MP (better)
32 MP
Battery
Battery
6,510 mAh (better)
5,410 mAh
Charging speed
90 W
90 W
Wireless charging
Yes
Yes
Software
Operating system
Android
Android
Software
Android 16, OriginOS 6
Xiaomi HyperOS 2
OS updates promised
5
—
OS updates counted in
Upgrades
—
Security updates promised
7 years
—
Build
Weight
226 g (better)
229 g
5G
Yes
Yes
Water resistance
IP68 + IP69
IP68
SIM
Dual SIM (2 nano SIMs)
Dual SIM (nano SIM + nano SIM or nano SIM + eSIM)
Colours
Dune Gold, Elite Black
Silver Chrome

A tick marks the better value where the category rules say higher (or lower) is better. Text values are shown without a winner. Ties have no winner.

Price and availability

Store links are not paid: prices are copied from each store's own page with the date checked, and Comparezi earns only from labelled ads. How we earn

X300 Pro

No price yet

15 Ultra

No price yet

Pros and cons

X300 Pro

  • Pro: 90 W wired charging, faster than 84 % of the 338 phones on Comparezi with a published figure
  • Pro: Dedicated 200 MP telephoto camera
  • Pro: Wireless charging
  • Pro: IP68 + IP69 dust and water resistance
  • Pro: 7 years of security updates promised
  • Con: Heavier than most phones on Comparezi (226 g)

15 Ultra

  • Pro: 90 W wired charging, faster than 84 % of the 338 phones on Comparezi with a published figure
  • Pro: Dedicated 200 MP telephoto camera
  • Pro: Wireless charging
  • Pro: IP68 dust and water resistance
  • Con: Heavier than most phones on Comparezi (229 g)
  • Con: No published update policy

Which should you buy?

X300 Pro if you want the strongest overall specification: it has the higher Comparezi Score (60.9).

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