vivo X300 Ultra vs Xiaomi 17 Ultra
The vivo X300 Ultra and the Xiaomi 17 Ultra share the same PhoneRanked score of 8.4. The vivo X300 Ultra leads in display, battery and design, while the Xiaomi 17 Ultra is ahead in camera. The vivo X300 Ultra is the newer phone, announced Mar 30, 2026.
Key differences
Why choose the vivo X300 Ultra
- Bigger battery 6,600 mAh vs 6,000 mAh
- Faster wired charging 100 W vs 90 W
- Brighter screen 4,500 nits vs 3,500 nits
- Higher refresh rate 144 Hz vs 120 Hz
- Better water resistance IP68 + IP69 vs IP68
- Newer model Mar 30, 2026 vs Dec 25, 2025
Why choose the Xiaomi 17 Ultra
- Silicon-carbon battery
- Bigger screen 6.9 inches vs 6.82 inches
- Faster wireless charging 50 W vs 40 W
- Lighter 218.4 g vs 237 g
- Thinner 8.29 mm vs 8.49 mm
- Higher-resolution video 8K@30 vs 4K@120
PhoneRanked scores
Calculated from specs, relative to phones from the same year and price range. How we rate phones
Value for money marked “est.” is an estimate: that phone has no official US launch price, so it is not highlighted against the others.
Spec
vivo X300 UltraXiaomi 17 Ultra
Overall
8.4
8.4
Display
9.0
8.5
Performance
9.0
9.0
Camera
8.1
8.9
Battery
8.3
8.0
Design
8.6
8.3
Software support
8.4
—
Value for money
6.0 est.
6.0 est.
Display
Spec
vivo X300 UltraXiaomi 17 Ultra
Size
6.82 inches
6.9 inches
Type
OLED, 2K ZEISS Master Color Display
OLED, Xiaomi HyperRGB OLED
Resolution
1440 × 3168 px
1200 × 2608 px
Pixel density
510 ppi
416 ppi
Refresh rate
144 Hz
120 Hz
Adaptive refresh
✓ Yes
✓ Yes
Peak brightness
4,500 nits
3,500 nits
HDR
—
HDR10, HDR10+, Dolby Vision, HDR Vivid
Protection
Armor Glass
Xiaomi Shield Glass 3.0
Performance
Spec
vivo X300 UltraXiaomi 17 Ultra
Process
3 nm
3 nm
Max CPU clock
4.6 GHz
4.6 GHz
GPU
Adreno 840
Adreno 840
RAM
16 GB
16 GB
Storage
512 GB / 1 TB
512 GB / 1 TB
Storage type
UFS 4.1
UFS 4.1
microSD slot
✕ No
✕ No
Cameras
Spec
vivo X300 UltraXiaomi 17 Ultra
Main camera
200 MP, f/1.85, 1/1.12"
50 MP, f/1.67, 1"
Optical stabilization
✓ Yes
✓ Yes
Ultrawide
50 MP
50 MP
Telephoto
200 MP, periscope
200 MP, 4.3× optical, periscope
Optical zoom
—
4.3×
Rear cameras
3
3
Rear video
4K@120
8K@30
Front camera
50 MP
50 MP
Front video
—
4K@60
Battery and charging
Spec
vivo X300 UltraXiaomi 17 Ultra
Capacity
6,600 mAh
6,000 mAh
Battery type
Li-Ion
Silicon-carbon
Wired charging
100 W
90 W
Wireless charging
40 W
50 W
Reverse wireless
—
✓ Yes
Charger in box
✓ Yes
✕ No
Design and build
Spec
vivo X300 UltraXiaomi 17 Ultra
Dimensions
162.98 × 76.81 × 8.49 mm
162.9 × 77.6 × 8.29 mm
Thickness
8.49 mm
8.29 mm
Weight
237 g
218.4 g
Form factor
Bar
Bar
Frame
Aluminum
Aluminum
Back
Glass
Fiberglass
Water resistance
IP68 + IP69
IP68
Fingerprint
Under-display ultrasonic
Under-display ultrasonic
3D face unlock
✕ No
✕ No
SIM
Dual Nano-SIM + eSIM
Dual Nano-SIM + eSIM
Colors
Steppe Green, Volcano Black, Alpine White
Starlit Green, Black, White
Connectivity and features
Spec
vivo X300 UltraXiaomi 17 Ultra
5G
✓ Yes
✓ Yes
Wi-Fi
Wi-Fi 7
Wi-Fi 7
Bluetooth
6.0
6.0
USB
USB-C 3.x
USB-C 3.x
NFC
✓ Yes
✓ Yes
3.5 mm jack
✕ No
✕ No
Stereo speakers
✓ Yes
✓ Yes
Satellite
✕ No
✕ No
IR blaster
✓ Yes
✓ Yes
Software
Spec
vivo X300 UltraXiaomi 17 Ultra
OS at launch
Android 16
Android 16
Interface
OriginOS 6
Xiaomi HyperOS 3
OS updates
5 years
—
Security updates
7 years
—
Launch and price
Spec
vivo X300 UltraXiaomi 17 Ultra
Announced
Mar 30, 2026
Dec 25, 2025
Released
Apr 3, 2026
Dec 27, 2025
Status
Released
Released
Green marks the stronger value in a row. Specs come from official manufacturer data, cross-checked with established tech media; each phone page lists its sources. Report an error
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