vivo X300 Ultra vs OnePlus 15
Overall: OnePlus 15. Both use the Snapdragon 8 Elite Gen 5 (flagship). The X300 Ultra starts with more RAM (16 GB against 12 GB). The OnePlus 15 has the bigger battery (7,300 mAh against 6,600 mAh). The OnePlus 15 has faster wired charging (120 W against 100 W).
vivo
X300 Ultra
Snapdragon 8 Elite Gen 5
OnePlus
OnePlus 15
3DSnapdragon 8 Elite Gen 5What matters to you?
Tap what you use your phone for. The overall pick then counts only those.
Overall: OnePlus 15
Better for everyday life. Score: OnePlus 15 1, X300 Ultra 0 (clear win 2, slight edge 1, same 0).
Backed by facts100% of areas
Pick this for…
Who wins for each way you use a phone. Tap a card for the evidence.
Social media
Chats, calls, lives and feeds
Same in practiceEither oneBenchmarksOfficialWhy? See the evidenceHide the evidence
Social media
Chats, calls, lives and feeds
- Everyday speed: both use the Snapdragon 8 Elite Gen 5, 5 of 5.
- Memory: 16 GB against 12 GB, so more apps stay open when you switch between chats and feeds.
- Front camera video for calls and lives: 4K@60fps against 4K@60fps.
Gaming
Light games to heavy 3D, online and offline
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Gaming
Light games to heavy 3D, online and offline
- Gaming power: both use the Snapdragon 8 Elite Gen 5, 5 of 5.
- Graphics: the same Adreno 840 (3 nm) in both.
- Screen: 144 Hz against 165 Hz.
- Light games run well on both. The gap shows in heavy 3D games. How long a phone holds its speed when hot needs testing, so it is not judged.
Camera and content creation
Photos, video recording and editing
Same in practiceEither oneOfficialBenchmarksWhy? See the evidenceHide the evidence
Camera and content creation
Photos, video recording and editing
- Video recording: 8K@30fps against 8K@30fps.
- Front camera video: 4K@60fps against 4K@60fps.
- Editing and export: both use the Snapdragon 8 Elite Gen 5, 5 of 5. Storage: not listed for either phone.
- Photo and video quality need side-by-side testing, so we do not judge them from megapixels.
Work, study and AI
Learning, research, writing and AI assistants
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Work, study and AI
Learning, research, writing and AI assistants
- Heavy work: both use the Snapdragon 8 Elite Gen 5, 5 of 5.
- Memory: 16 GB against 12 GB. On-phone AI features need plenty of memory; most AI assistants run online and work on any phone.
- Screen: 6.82″ LTPO AMOLED against 6.78″ LTPO AMOLED.
Movies, music and streaming
YouTube, Netflix, sport, music and podcasts
Same in practiceEither oneOfficialBenchmarksWhy? See the evidenceHide the evidence
Movies, music and streaming
YouTube, Netflix, sport, music and podcasts
- Screen: 6.82″ LTPO AMOLED against 6.78″ LTPO AMOLED.
- AV1 video decoding (smoother YouTube and Netflix, less battery): not listed against not listed.
- Sound: stereo speakers, against stereo speakers.
Everyday life
Maps, ride-hailing, payments and banking
Slight edgePick OnePlus 15OfficialWhy? See the evidenceHide the evidence
Everyday life
Maps, ride-hailing, payments and banking
- Tap to pay (NFC): yes against yes.
- Location: single-band GPS against dual-band GPS (L1 + L5). Dual-band GPS stays accurate between tall buildings.
Phone basics
What every use depends on, side by side.
Battery life
X300 Ultra6,600 mAh100 W charging
OnePlus 157,300 mAh120 W charging
Efficiency: Snapdragon 8 Elite Gen 5 5 of 5, Snapdragon 8 Elite Gen 5 5 of 5
Storage
X300 Ultra512 GB / 1 TBType not published
OnePlus 15256 GB / 512 GB / 1 TBType not published
UFS opens apps and files far faster than eMMC
Speed
X300 UltraSnapdragon 8 Elite Gen 516 GB RAM
OnePlus 15Snapdragon 8 Elite Gen 512 GB / 16 GB RAM
Everyday speed: 5 of 5 against 5 of 5
Screen
X300 Ultra6.82″ LTPO AMOLED144 Hz
OnePlus 156.78″ LTPO AMOLED165 Hz
Bigger is not better; pick the size you like
Toughness
X300 UltraIP68
OnePlus 15IP68
IP68 survives dust and a dunk in water
Years of updates
X300 UltraNo promise publishedLaunched March 2026
OnePlus 15No promise publishedLaunched October 2025
From the maker’s written update promise
Side by side
Show differences only
| Spec | X300 Ultra | OnePlus 15 |
|---|---|---|
| Size | 6.82″ | 6.78″ |
| Type | LTPO AMOLED | LTPO AMOLED |
| Resolution | 3168 × 1440 | 1272 × 2772 |
| Refresh rate | 144 Hz | 165 Hz |
| Peak brightness | — | 1800 nits |
| Spec | X300 Ultra | OnePlus 15 |
|---|---|---|
| Chipset | Snapdragon 8 Elite Gen 5 | Snapdragon 8 Elite Gen 5 |
| RAM | 16 GB | 12 GB / 16 GB |
| Storage | 512 GB / 1 TB | 256 GB / 512 GB / 1 TB |
| Storage type | — | — |
| Spec | X300 Ultra | OnePlus 15 |
|---|---|---|
| Main camera | 200 MP | 50 MP |
| Zoom | 3.7x optical | 3.5x optical |
| Video recording | 8K@30fps | 8K@30fps |
| Front camera | 50 MP | 32 MP |
| Front video | 4K@60fps | 4K@60fps |
| Spec | X300 Ultra | OnePlus 15 |
|---|---|---|
| Capacity | 6600 mAh | 7300 mAh |
| Wired charging | 100 W | 120 W |
| Wireless charging | 40 W | 50 W |
| Spec | X300 Ultra | OnePlus 15 |
|---|---|---|
| Stereo speakers | Yes | Yes |
| Headphone jack | — | — |
| NFC (tap to pay) | Yes | Yes |
| Dual-band GPS | No | Yes |
| 5G | Yes | Yes |
| eSIM | Yes | Yes |
| Spec | X300 Ultra | OnePlus 15 |
|---|---|---|
| Weight | 232 g | 211 g |
| Thickness | 8.19 mm | 8.1 mm |
| Water resistance | IP68 | IP68 |
| Spec | X300 Ultra | OnePlus 15 |
|---|---|---|
| At launch | Android 16 | Android 16 |
| OS upgrades | Not stated | Not stated |
| Security updates | Not stated | Not stated |
Quick answers
- Is the X300 Ultra or the OnePlus 15 better for social media?
- For social media, there’s no real difference between them. Everyday speed: both use the Snapdragon 8 Elite Gen 5, 5 of 5.
- Is the X300 Ultra or the OnePlus 15 better for gaming?
- For gaming, there’s no real difference between them. Gaming power: both use the Snapdragon 8 Elite Gen 5, 5 of 5.
- Is the X300 Ultra or the OnePlus 15 better for camera and content creation?
- For camera and content creation, there’s no real difference between them. Video recording: 8K@30fps against 8K@30fps.
- Is the X300 Ultra or the OnePlus 15 better for work, study and ai?
- For work, study and ai, there’s no real difference between them. Heavy work: both use the Snapdragon 8 Elite Gen 5, 5 of 5.
- Is the X300 Ultra or the OnePlus 15 better for movies, music and streaming?
- For movies, music and streaming, there’s no real difference between them. Screen: 6.82″ LTPO AMOLED against 6.78″ LTPO AMOLED.
- Is the X300 Ultra or the OnePlus 15 better for everyday life?
- The OnePlus 15 has a slight edge for everyday life. Tap to pay (NFC): yes against yes.
What we don’t judge on
Security patch level, charging watts, megapixels, benchmark scores and guessed values.
- Security patch level and other software settings change with every update, so one reading can’t judge a phone. We use the maker’s written update promise.
- Charging watts, megapixels, screen size and weight are shown, never scored as better: faster charging doesn’t make a battery last longer, and more megapixels don’t make better photos.
- Chip estimates (1 to 5) come from published design facts: core design and year, graphics, manufacturing and video features. Photo quality and how long a phone holds its speed when hot need testing, so they aren’t judged.
- Values with no source show “not published” and stay out of the verdict.
vivo X300 Ultra specsOnePlus 15 specsCompare with another phone