iQOO 15 Ultra vs Y400 Pro

Side-by-side comparison with real-scale visuals and detailed specifications

100% Objective Comparisons — Data sourced from official manufacturers

See our methodology

100%

Y400 Pro is 0.4% taller

iQOO 15 Ultra

164.3mm×74.8mm

Y400 Pro

163.6mm×75.3mm

Scaled to real proportions

Specifications Comparison

iQOO 15 Ultra

vivo

3 wins

Y400 Pro

vivo

5 wins

📱

Screen Size

Diagonal screen measurement

Better

iQOO 15 Ultra

6.78"

Y400 Pro

6.7"

Difference: 0.08" (1.2% more)

🔋

Battery

Battery capacity in milliamp-hours

Better

iQOO 15 Ultra

4,500mAh

Y400 Pro

5,000mAh

Difference: 500mAh (11.1% more)

💾

RAM

Random Access Memory for multitasking

Better

iQOO 15 Ultra

12GB

Y400 Pro

8GB

Difference: 4GB (50.0% more)

⚖️

Weight

Total device weight

Better

iQOO 15 Ultra

210g

Y400 Pro

190g

Difference: 20g (10.5% less)

💿

Storage

Internal storage capacity

Better

iQOO 15 Ultra

256GB

Y400 Pro

128GB

Difference: 128GB (100.0% more)

📷

Main Camera

Main camera resolution

Better

iQOO 15 Ultra

50MP

Y400 Pro

64MP

Difference: 14MP (28.0% more)

💰

Price

Retail price in USD

Better

iQOO 15 Ultra

999$

Y400 Pro

249$

Difference: 750$ (301.2% less)

📏

Height

Device height

iQOO 15 Ultra

164.3mm

Y400 Pro

163.6mm

📐

Width

Device width

iQOO 15 Ultra

74.8mm

Y400 Pro

75.3mm

📦

Thickness

Device thickness/depth

Better

iQOO 15 Ultra

9.2mm

Y400 Pro

8.5mm

Difference: 0.7mm (8.2% less)

iQOO 15 Ultra

Y400 Pro

Winner in category

Last updated: March 23, 2026

Source: Official Source

Last updated: March 23, 2026

Source: Official Source

Why Trust Our Comparisons

Verified Data

All specs verified from official sources

No Affiliate Bias

We don't earn from product sales

Regularly Updated

Data refreshed when specs change

Transparent Method

Our comparison methodology is public

SizeVS Editorial Team

Verified

Product Comparison Specialists

Our team of tech enthusiasts and data analysts work to provide accurate, unbiased product comparisons.

Verified Data Sources Editorial Standards

Updated: March 24, 2026

Our methodology

Explore this matchup

View iQOO 15 Ultra View Y400 Pro Screen Size Battery RAM Weight Storage

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