17 Ultra (China) vs Y21d

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

100% Objective Comparisons — Data sourced from official manufacturers

See our methodology

100%

Y21d is 1.1% taller

17 Ultra (China)

162.5mm×75.8mm

Y21d

164.3mm×76.1mm

Scaled to real proportions

Specifications Comparison

17 Ultra (China)

Xiaomi

4 wins

Y21d

vivo

3 wins

📱

Screen Size

Diagonal screen measurement

Better

17 Ultra (China)

6.73"

Y21d

6.51"

Difference: 0.22" (3.4% more)

🔋

Battery

Battery capacity in milliamp-hours

= Tie

17 Ultra (China)

5,000mAh

Y21d

5,000mAh

Difference: 0mAh

💾

RAM

Random Access Memory for multitasking

Better

17 Ultra (China)

12GB

Y21d

4GB

Difference: 8GB (200.0% more)

⚖️

Weight

Total device weight

Better

17 Ultra (China)

228g

Y21d

182g

Difference: 46g (25.3% less)

💿

Storage

Internal storage capacity

Better

17 Ultra (China)

256GB

Y21d

128GB

Difference: 128GB (100.0% more)

📷

Main Camera

Main camera resolution

Better

17 Ultra (China)

200MP

Y21d

50MP

Difference: 150MP (300.0% more)

💰

Price

Retail price in USD

Better

17 Ultra (China)

899$

Y21d

199$

Difference: 700$ (351.8% less)

📏

Height

Device height

17 Ultra (China)

162.5mm

Y21d

164.3mm

📐

Width

Device width

17 Ultra (China)

75.8mm

Y21d

76.1mm

📦

Thickness

Device thickness/depth

Better

17 Ultra (China)

9.1mm

Y21d

7.8mm

Difference: 1.3mm (16.7% less)

17 Ultra (China)

Y21d

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 17 Ultra (China) View Y21d Screen Size Battery RAM Weight Storage

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