OnePlus 15T vs Vivo X300 Ultra

Updated Nov 2026 · Scored by the Let’s Compare Data Engine · How we score

The OnePlus 15T and Vivo X300 Ultra are closely matched at 76 and 75/100. The OnePlus 15T edges ahead on Memory and Storage, while the Vivo X300 Ultra leads on Display and Rear Camera — pick the one whose strengths match what you'll actually use.

Verdict

Our overall take, at a glance

OnePlus 15T and Vivo X300 Ultra are closely matched

OnePlus 15T

Vivo X300 Ultra

Where OnePlus 15T stands out

Storage capacity: 1,024 GB (300% more)
Memory RAM capacity: 16 GB (33% more)
Weight: 194 g (16% less)

Where Vivo X300 Ultra stands out

Rear camera (megapixels): 200 MP (300% more)
Front camera (megapixels): 50 MP (213% more)
Display Resolution: 1440 × 3168 px

Winner by category for OnePlus 15T vs Vivo X300 Ultra
Category	OnePlus 15T	Vivo X300 Ultra	Winner
Chip	83	83	Tie
Memory	82	69	OnePlus 15T
Storage	82	39	OnePlus 15T
Display	63	73	Vivo X300 Ultra
Rear Camera	66	73	Vivo X300 Ultra
Front Camera	42	52	Vivo X300 Ultra
Cellular	84	84	Tie
Connectivity	73	73	Tie
Sensors	85	85	Tie
Design & Weight	58	45	OnePlus 15T
Power & Battery	86	84	Tie
Benchmark	85	91	Vivo X300 Ultra
Miscellaneous	84	84	Tie
Security	85	85	Tie

In-depth analysisAI

AI-generated from the cited sources — may be incomplete or inaccurate; verify important details before deciding · generated Nov 2026.

OnePlus 15T

The OnePlus 15T is a smartphone concept from Chinese electronics manufacturer OnePlus, a brand backed by Oppo. Because specific technical specifications, processors, or release details for this model are absent from the provided documentation, its exact hardware capabilities remain unverified. It follows the brand's historical lineage of developing flagship and mid-range mobile devices.

Best for Consumers tracking the brand's corporate alignment and product history under…

Pros

Beneficiary of Oppo's established manufacturing lines and industrial resources
Builds on a corporate history of developing high-end flagship smartphones

Cons

No verifiable hardware specifications or official features are detailed in the provided documentation
Associated with a brand navigating recent corporate restructuring and market withdrawals

Vivo X300 Ultra

The Vivo X300 Ultra is a high-end flagship smartphone designed for mobile photography enthusiasts and power users looking for professional-grade imaging capabilities. It is powered by the Snapdragon 8 Elite Gen 5 processor paired with LPDDR5X memory, featuring a large 6.82-inch 144Hz LTPO AMOLED display and an advanced multi-sensor camera array anchored by a 200MP main sensor and a 200MP periscope telephoto lens.

Best for long-range and telephoto mobile photographyBest for high-frame-rate 4K and 8K video captureBest for all-day heavy multimedia usage

Pros

Extensive multi-focal length camera setup featuring high-resolution 200MP main and telephoto sensors with OIS
High-capacity 6600mAh battery supporting 100W wired and 40W wireless charging
Vibrant 6.82-inch LTPO AMOLED display with adaptive 1-144Hz refresh rate and Dolby Vision support
Robust performance driven by the Snapdragon 8 Elite Gen 5 chip and UFS 4.1 storage

Cons

Bulky physical footprint with a weight of 232g or more depending on the finish
Lacks expandable storage via a microSD card slot
Absence of a traditional 3.5mm headphone jack

Official

Official product pageProvided official details on the Zeiss master lens group, physical dimensions, and core hardware design.

Source

Video — reviews used (1)

Generated Nov 4, 2026

Value for Money

Which is the better deal for the price

Pre-filled with launch prices where known — enter today's price for an up-to-date check. Use the same currency for both.

OnePlus 15T

Check Price on Amazon

Vivo X300 Ultra

Check Price on Amazon

Battery capacity

Larger cell — a hardware spec, not battery life

OnePlus 15T7,500 mAh

Vivo X300 Ultra6,600 mAh

Capacity is the raw battery size. Real-world battery life depends just as much on the processor, software and display.

Physical Comparison

Weigh them up, then compare real dimensions in 3D

OnePlus 15TVivo X300 Ultra

Vivo X300 Ultra is 38 g (20%) heavier than OnePlus 15T.

Review Videos

Hand-picked expert reviews for each product

Detailed Specifications

The full spec sheet, side by side

Chip

Feature	OnePlus 15T	Vivo X300 Ultra
Model

Memory

Feature	OnePlus 15T	Vivo X300 Ultra
RAM capacity	16 GB33% more	12 GB
Memory technology

Storage

Feature	OnePlus 15T	Vivo X300 Ultra
Storage capacity	1,024 GB300% more	256 GB
Is expandable	No	No

Display

Feature	OnePlus 15T	Vivo X300 Ultra
Size	6.32 in	6.82 in8% more
Resolution	1216 × 2640 px	1440 × 3168 px
Pixel density	460 PPI	510 PPI11% more
Refresh rate	165 Hz15% more	144 Hz
Display technology
Protection	Crystal Shield Glass	Armor glass
Has pen support	No	No
Screen-to-body ratio	91%	90%

Rear Camera

Feature	OnePlus 15T	Vivo X300 Ultra
Rear camera (megapixels)	50 MP	200 MP300% more
Rear camera aperture	1.85% less	1.9
Optical zoom	3.5	4.734% more
Has High Dynamic Range (HDR)	Yes	Yes
Has Optical Image Stabilization (OIS)	Yes	Yes
Number of cameras	2	3
Other cameras	50 MP telephoto f/2.8	200 MP f/2.7, 50 MP ultrawide f/2.0

Front Camera

Feature	OnePlus 15T	Vivo X300 Ultra
Front camera (megapixels)	16 MP	50 MP213% more
Front camera aperture	2.44% less	2.5

Cellular

Feature	OnePlus 15T	Vivo X300 Ultra
Cellular technology
SIM type
Has dual-sim support	Yes	Yes

Connectivity

Feature	OnePlus 15T	Vivo X300 Ultra
Bluetooth technology
Wi-Fi technology
Connector
Has a headphone jack	No	No

Sensors

Feature	OnePlus 15T	Vivo X300 Ultra
Has a NFC sensor	Yes	Yes
Has an accelerometer sensor	Yes	Yes
Has a gyroscope sensor	Yes	Yes
Has a magnetic field sensor	Yes	Yes
Has an atmospheric pressure sensor	No	No
Has a GPS sensor	Yes	Yes

Design & Weight

Feature	OnePlus 15T	Vivo X300 Ultra
Color	N/A	N/A
Dimensions	7.18 × 15.06 × 0.84 cm	7.68 × 16.3 × 0.82 cm
Weight	194 g16% less	232 g

Power & Battery

Feature	OnePlus 15T	Vivo X300 Ultra
Battery capacity	7,500 mAh14% more	6,600 mAh
Has wireless charging support	Yes	Yes
Has fast charging support	Yes	Yes

Benchmark

Feature	OnePlus 15T	Vivo X300 Ultra
Antutu score	N/A	2,723,497
Geekbench single-core score	3,621	3,7303% more
Geekbench multi-core score	10,976	11,4945% more

Miscellaneous

Feature	OnePlus 15T	Vivo X300 Ultra
Release date	March 29, 2026	April 3, 2026
SAR (Head)	N/A	N/A
SAR (Body)	N/A	N/A
Dust & Water resistance
Operating system	Android 16	Android 16

Security

Feature	OnePlus 15T	Vivo X300 Ultra
Has a fingerprint scanner	Yes	Yes
Has an advanced face scanner	No	No

Specification Note

Specifications are compiled from official manufacturer data and other reliable internet sources. Some features may vary by region or model configuration.

Frequently Asked Questions

Common questions about OnePlus 15T vs Vivo X300 Ultra comparison

They are closely matched: OnePlus 15T scores 86/100 and Vivo X300 Ultra scores 84/100 in our overall comparison — within 2 points. Neither is a clear winner overall, so the decision comes down to the specific features and price that matter most to you.

OnePlus 15T and Vivo X300 Ultra are compared side by side above across every spec in the smartphones category — including performance, features and design — each scored 0–100 so you can see exactly where one leads the other. Our overall scores are 86/100 for OnePlus 15T and 84/100 for Vivo X300 Ultra.

It's close — OnePlus 15T (86/100) and Vivo X300 Ultra (84/100) score almost the same. Pick based on price and the individual specs that matter most to you; the comparison above shows where each one pulls ahead.