OnePlus
15R vs X300 Ultra
Device summary
vivo
X300 Ultra
Full specifications
| Basic information | ||
|---|---|---|
| Release year | 2025 | 2026 |
| Starting price | $700 | — |
| Display size | 6.8-inch | 6.8-inch |
| Dimensions | 77.0 mm × 163.4 mm × 8.3 mm | 76.8 mm × 163.0 mm × 8.2 mm |
| Weight | 214 g | 232 g |
| Front material | — | — |
| Back material | — | — |
| Display | ||
| Display technology | AMOLED | — |
| Resolution | 2800 × 1272 | 3168 × 1440 |
| Refresh rate | 165 Hz | — |
| Peak brightness | 1800 nits | — |
| Protection | Corning Gorilla Glass 7i | — |
| Performance | ||
| Chipset | Snapdragon 8 Gen 5 | Snapdragon 8 Elite Gen 5 |
| RAM | 12 GB | 16 GB |
| Storage | 256 GB, 512 GB | 512 GB |
| Cameras | ||
| Main camera | Main · 50 MP · OIS | Main · 200 MP · ƒ/1.85 · OIS |
| Ultra-wide camera | — | Ultra Wide · 50 MP · ƒ/2.0 |
| Telephoto camera | — | Telephoto · 200 MP · ƒ/2.67 · OIS |
| Front cameras | Front · 32 MP | Front · 50 MP · ƒ/2.45 |
| Video recording | 4K at 120 fps | — |
| Battery & charging | ||
| Battery capacity | 7400 mAh | — |
| Wired charging | 80 W | 100 W |
| Battery type | Silicon NanoStack | — |
| Typical capacity | — | 6600 mAh |
| Rated capacity | — | 6395 mAh |
| Connectivity | ||
| Cellular | — | 5G, LTE |
| Wi‑Fi | — | Wi‑Fi 6E |
| Bluetooth | — | Bluetooth 6.0 |
| USB | — | USB 3.2 |
| Build & durability | ||
| Ingress protection | IP66; IP68; IP69; IP69K | — |
Basic information
Release year
- 15R
- 2025
- X300 Ultra
- 2026
Starting price
- 15R
- $700
- X300 Ultra
- —
Display size
- 15R
- 6.8-inch
- X300 Ultra
- 6.8-inch
Dimensions
- 15R
- 77.0 mm × 163.4 mm × 8.3 mm
- X300 Ultra
- 76.8 mm × 163.0 mm × 8.2 mm
Weight
- 15R
- 214 g
- X300 Ultra
- 232 g
Front material
- 15R
- —
- X300 Ultra
- —
Back material
- 15R
- —
- X300 Ultra
- —
Display
Display technology
- 15R
- AMOLED
- X300 Ultra
- —
Resolution
- 15R
- 2800 × 1272
- X300 Ultra
- 3168 × 1440
Refresh rate
- 15R
- 165 Hz
- X300 Ultra
- —
Peak brightness
- 15R
- 1800 nits
- X300 Ultra
- —
Protection
- 15R
- Corning Gorilla Glass 7i
- X300 Ultra
- —
Performance
Chipset
- 15R
- Snapdragon 8 Gen 5
- X300 Ultra
- Snapdragon 8 Elite Gen 5
RAM
- 15R
- 12 GB
- X300 Ultra
- 16 GB
Storage
- 15R
- 256 GB, 512 GB
- X300 Ultra
- 512 GB
Cameras
Main camera
- 15R
- Main · 50 MP · OIS
- X300 Ultra
- Main · 200 MP · ƒ/1.85 · OIS
Ultra-wide camera
- 15R
- —
- X300 Ultra
- Ultra Wide · 50 MP · ƒ/2.0
Telephoto camera
- 15R
- —
- X300 Ultra
- Telephoto · 200 MP · ƒ/2.67 · OIS
Front cameras
- 15R
- Front · 32 MP
- X300 Ultra
- Front · 50 MP · ƒ/2.45
Video recording
- 15R
- 4K at 120 fps
- X300 Ultra
- —
Battery & charging
Battery capacity
- 15R
- 7400 mAh
- X300 Ultra
- —
Wired charging
- 15R
- 80 W
- X300 Ultra
- 100 W
Battery type
- 15R
- Silicon NanoStack
- X300 Ultra
- —
Typical capacity
- 15R
- —
- X300 Ultra
- 6600 mAh
Rated capacity
- 15R
- —
- X300 Ultra
- 6395 mAh
Connectivity
Cellular
- 15R
- —
- X300 Ultra
- 5G, LTE
Wi‑Fi
- 15R
- —
- X300 Ultra
- Wi‑Fi 6E
Bluetooth
- 15R
- —
- X300 Ultra
- Bluetooth 6.0
USB
- 15R
- —
- X300 Ultra
- USB 3.2
Build & durability
Ingress protection
- 15R
- IP66; IP68; IP69; IP69K
- X300 Ultra
- —
Key differences
The most meaningful measured gaps in size and weight — not an overall winner.
Weight
15R
18 g lighter
Height
Very similar height
Width
Very similar width
Thickness
Very similar thickness
User Experience Summary
15R
Strengths
- 7400mAh Silicon NanoStack battery — class-leading stamina
- Snapdragon 8 Gen 5 with 165Hz 1.5K AMOLED gaming canvas
- 80W SuperVOOC wired and IP69K sealing
Compromises
- No telephoto camera versus OnePlus 15 and many rivals
- No wireless charging on a premium-feeling chassis
- LTPS display without LTPO adaptive refresh
X300 Ultra
Strengths
- Class-leading Zeiss imaging with 200 MP main and periscope telephoto
- Sharp 6.82-inch QHD+ AMOLED with adaptive 144 Hz
- Elite Gen 5 speed with 100 W wired and 40 W wireless charging
Compromises
- Heavy 232 g phablet ergonomics versus X300 FE and standard flagships
- OriginOS 6 promotional surfaces at Ultra pricing
- Thermal warmth during sustained 4K video and gaming