Vivo X300 Ultra vs Xiaomi 15 Ultra

Direct side-by-side battle analyzing hardware specifications, benchmark percentiles, battery endurance, and category performance advantages.

Smartphone Battle

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Vivo · 2026

Vivo X300 Ultra

92/ 100

Launch MSRP$1,992 USD

Xiaomi · 2025

Xiaomi 15 Ultra

88/ 100

Launch MSRP$1,599 USD

WHO WINS WHERE

WHY IS Vivo X300 Ultra BETTER THAN Xiaomi 15 Ultra?

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Vivo X300 UltraWinner 🏆

Xiaomi 15 Ultra

BIGGEST HARDWARE DIFFERENCES

Margin Delta

SPEC FACTOR	Vivo X300	Xiaomi 15	LEADER
Refresh Rate	120Hz	120Hz	120Hz
Battery Capacity	6,600 mAh	5,410 mAh	+6,600 mAh
Wired Fast Charging	100W	90W	100W Max
Main Camera Sensor	200 MP	50 MP	200 MP
Screen Display Size	6.82"	6.73"	6.82"
Chassis Weight	235g	226g	226g Lightest

Compare All 177+ Specifications Below↓

Which Phone Should You Buy: Key Reasons & Hardware Advantages

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Reasons to buy Vivo X300 Ultra:

✓Larger 6,600 mAh battery capacity (+1,190 mAh more capacity)
✓200MP primary camera sensor with 4K/120fps video recording
✓6.82" display with 120Hz ProMotion refresh rate

Reasons to buy Xiaomi 15 Ultra:

✓9g lighter chassis (226g) optimized for one-handed ergonomics
✓$393 lower launch MSRP ($1599 vs $1992)
✓50MP primary camera sensor with 4K/120fps video recording

How Do the Specifications Compare Side-by-Side?

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Specification	Vivo X300 Ultra	Xiaomi 15 Ultra
1. Display & Screen🏆 Vivo X300 Ultra Wins Display
Screen Type & Tech	LTPO AMOLED	LTPO AMOLED
Screen Size	6.82"	6.73"
Resolution & Density	3168x1440 (510 ppi)	3200x1440 (522 ppi)
Refresh Rate	120 Hz ProMotion	120 Hz ProMotion
Brightness	4,500 nits peak	3,200 nits peak
Screen Protection	Scratch-resistant glass	Scratch-resistant glass
2. Platform & Performance🏆 Vivo X300 Ultra Wins Performance
Chipset / Processor	High performance SoC	High performance SoC
CPU Cores	Multi-core high performance	Multi-core high performance
GPU Graphics	Integrated Graphics	Integrated Graphics
Operating System	Android 16	Android 15
3. Memory & Storage
RAM Memory	16 GB LPDDR	16 GB LPDDR
Internal Storage	256GB / 512GB / 1024GB	256GB / 512GB / 1024GB
Storage Speed	High-speed flash	High-speed flash
Card Slot	No	No
4. Main Camera Optics🏆 Vivo X300 Ultra Wins Camera
Primary Camera	200 MP, f/1.6, OIS, Sony LYT-901	50 MP, f/1.63, OIS, Sony LYT-900
Telephoto Zoom	200 MP (3.7x optical zoom), f/2.5, OIS	50 MP (5x optical zoom), f/2.5, OIS
Ultrawide Camera	50 MP, f/2	50 MP, f/1.8
LiDAR / Depth	None	None
5. Video Recording Capabilities
Main Camera Video	4K@60fps1080p@240fpsHDR	4K@60fps1080p@240fpsHDR
Front Video	4K@60fps1080p@60fpsgyro-EIS	4K@60fps1080p@60fpsgyro-EIS
6. Selfie Camera
Selfie Lens	50 MP, f/2	32 MP, f/2
7. Body & Dimensions🏆 Xiaomi 15 Ultra Lightest Chassis
Dimensions	163.4 x 76.8 x 9 mm	161.3 x 75.5 x 9.5 mm
Weight	235 g	226 g
Build Materials	Glass front, metal/glass frame	Glass front, metal/glass frame
SIM Type	Nano-SIM / eSIM support	Nano-SIM / eSIM support
Water Resistance	IP69	IP68
8. Battery & Charging🏆 Vivo X300 Ultra Wins Battery
Battery Capacity	6,600 mAh	5,410 mAh
Wired Fast Charging	100W wired fast charging	90W wired fast charging
Wireless Charging	40W wireless charging	80W wireless charging
Reverse Charging	Reverse wireless charging	Reverse wireless charging
9. Sound & Audio
Loudspeaker	Stereo speakers	Stereo speakers
3.5mm Headphone Jack	No	No
10. Connectivity & Comms
Wi-Fi Standard	Wi-Fi 7	Wi-Fi 7
Bluetooth	6.0	5.4
USB Port & Speed	USB-C 3.2	USB-C 3.2
NFC	Yes (contactless payment)	Yes (contactless payment)
11. Sensors & Security
Sensors	Biometric fingerprint/face, accelerometer, gyro, compass	Biometric fingerprint/face, accelerometer, gyro, compass
Satellite Features	Emergency SOS via satellite (select markets)	Emergency SOS via satellite (select markets)
12. Colors & Overview
Colors	Standard finishes	Standard finishes
Launch Price	$1992	$1599

Editorial Lab Verdict

Vivo X300 Ultra edges ahead with a BeastScore of 92.2/100

After comprehensive hardware benchmark comparisons, Vivo X300 Ultra ranks as the overall top pick in this matchup. Key differentiators include its superior specifications and verified build advantages.

When to choose Vivo X300 Ultra:

Higher overall BeastScore: 92.2 vs top rival 87.6 · Larger battery capacity: 6,600 mAh (+1,190 mAh more)

When to choose Xiaomi 15 Ultra:

Lighter body: 226g (9g lighter in hand) · Lower launch price: $1599 (save $393)

Quick Answers

Frequently Asked Questions: Vivo X300 Ultra vs Xiaomi 15 Ultra

Which is better: Vivo X300 Ultra or Xiaomi 15 Ultra?

Vivo X300 Ultra leads with an overall BeastScore of 92.2/100 compared to Xiaomi 15 Ultra (87.6/100), driven by advantages in Higher overall BeastScore: 92.2 vs top rival 87.6 and Larger battery capacity: 6,600 mAh (+1,190 mAh more).