17 Ultra vs X300
True-scale visual comparison — see exact mm dimensions side by side with detailed specs.
100% Objective Comparisons — Data sourced from official manufacturers
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100%
X300 is 0.6% taller
17 Ultra
163.1mm×75.9mm
VS
X300
164mm×75mm
Scaled to real proportions
Specifications Comparison
A
17 Ultra
Xiaomi
3 wins
B
X300
vivo
3 wins
S
Screen Size
= Tie
17 Ultra
6.7"
X300
6.7"
Difference:
0"
B
Battery
= Tie
17 Ultra
5,000mAh
X300
5,000mAh
Difference:
0mAh
R
RAM
Better
17 Ultra
12GB
X300
8GB
Difference:
4GB
(50.0% more)
W
Weight
Better
17 Ultra
228g
X300
192g
Difference:
36g
(18.8% less)
S
Storage
Better
17 Ultra
256GB
X300
128GB
Difference:
128GB
(100.0% more)
M
Main Camera
Better
17 Ultra
200MP
X300
64MP
Difference:
136MP
(212.5% more)
P
Price
Better
17 Ultra
849$
X300
299$
Difference:
550$
(183.9% less)
H
Height
17 Ultra
163.1mm
X300
164mm
W
Width
17 Ultra
75.9mm
X300
75mm
T
Thickness
Better
17 Ultra
9mm
X300
8.5mm
Difference:
0.5mm
(5.9% less)
17 Ultra
X300
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
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Data refreshed when specs change
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Our comparison methodology is public