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Compare features, prices and ratings to find the perfect phone for you.
Our Verdict
Analysis
Xiaomi 15 Ultra has the bigger display.
Overall Winner
Xiaomi 15 Ultra
Display Winner
Xiaomi 15 Ultra
Performance Winner
Tie
Camera Winner
Tie
Battery Winner
Tie
Value Winner
Tie
Specifications Comparison
| Feature | Oppo Watch X2 | Xiaomi 15 Ultra |
|---|---|---|
| Display size (in) | 1.50 | 6.73 |
| Weight (g) | 49 | 226 |
| Thickness (mm) | 11.80 | 9.35 |
| Chipset | Qualcomm Snapdragon W5 Gen 1 (4 nm) | Snapdragon 8 Elite |
| OS | ColorOS Watch 7.0 + Wear OS 5.0 | Android 15, HyperOS 2 |
Pros & Cons
Oppo Watch X2
Xiaomi 15 Ultra
- Outstanding camera versatility
- Fast wired and wireless charging
- Bright display
- Heavy
- Software still polishing animations
- Limited availability in some regions
Every Spec, Side by Side
Specification
Oppo
Oppo Watch X2
Xiaomi
Xiaomi 15 Ultra
Battery 3 specs
Type
Li-Ion 648 mAh
Market-dependent versions:· Si/C Li-Ion 5410 mAh - Global· Si/C Li-Ion 6000 mAh - China
Charging
7.5W wired
90W wired, 80W wireless
Capacity
—
5410 mAh
Body 5 specs
Dimensions
47.6 x 46.6 x 11.8 mm (1.87 x 1.83 x 0.46 in)
161.3 x 75.3 x 9.35 mm
Weight
49.7 g (1.76 oz)
226 g
Build
Sapphire crystal front, stainless steel frame, plastic back
Glass front, glass-fiber reinforced plastic back or silicone polymer back (eco leather), aluminum frame
SIM
No
· Nano-SIM + Nano-SIM· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
MIL-STD-810H compliant
Waterproof (5ATM/50m)
Compatible with standard 22mm straps
ECG certified
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
Aerospace-grade glass fiber
Camera 1 spec
No
—
Connectivity 8 specs
WLAN
Wi-Fi 802.11 a/b/g/n, dual-band
Wi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band or tri-band, Wi-Fi Direct
Bluetooth
5.2, A2DP, LE
6.0, A2DP, LE, aptX HD, aptX Adaptive, LHDC 5
Positioning
GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5), GLONASS
NFC
Yes
Yes
Radio
No
No
USB
No
USB Type-C 3.2 Gen 2, DisplayPort, OTG
Infrared port
—
Yes
5G
—
Yes
Display 4 specs
Type
LTPO AMOLED, 2200 nits (peak)
LTPO AMOLED
Size
1.5 inches
6.73 inches
Resolution
466 x 466 pixels (~310 ppi density)
1440 x 3200 pixels
Protection
Sapphire crystal glass
Xiaomi Shield Glass 2.0, Mohs level 6
Features 2 specs
Sensors
Accelerometer, gyro, barometer, compass, heart rate, SpO2, thermometer (skin temperature)
Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometer
—
Two-way satellite communication (China model only)
Launch 2 specs
Announced
2025, February 20
2025, February 27
Status
Available. Released 2025, March 28
Available. Released 2025, February 27
Memory 5 specs
Card slot
No
No
Internal
32GB 2GB RAM
256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
—
UFS 4.1
RAM
—
16GB
Storage
—
512GB
Misc 4 specs
Colors
Lava Black, Summit Blue
Black, White, Silver Chrome, Green
Models
OPWWE251
25010PN30G
Price
About 300 EUR
$ 693.75 / £ 1,295.00 / € 812.34
SAR EU
—
1.00 W/kg (head) 1.00 W/kg (body)
Network 9 specs
Technology
No cellular connectivity
GSM / HSPA / LTE / 5G
2G bands
N/A
GSM 850 / 900 / 1800 / 1900
3G bands
N/A
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
N/A
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 42, 48, 66, 71 - International
Speed
No
HSPA, LTE, 5G
GPRS
No
—
EDGE
No
—
—
1, 2, 3, 5, 7, 8, 12, 20, 26, 28, 38, 40, 41, 48, 66, 77, 78, 79, 80, 81, 83, 84, 89 SA/NSA - China
5G bands
—
1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 48, 66, 71, 75, 77, 78, 79 SA/NSA - International
Platform 4 specs
OS
ColorOS Watch 7.0 + Wear OS 5.0
Android 15, HyperOS 2
Chipset
Qualcomm Snapdragon W5 Gen 1 (4 nm)
Snapdragon 8 Elite
GPU
—
Adreno 830
CPU
—
Octa-core (2x4.32 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)
Sound 3 specs
3.5mm jack
No
No
Loudspeaker
Yes
Yes, with stereo speakers
—
24-bit/192kHz Hi-Res & Hi-Res Wireless audio
Qualcomm XPAN (24-bit/96kHz audio)
Eu Label 4 specs
Energy
—
Class A
Battery
—
58:58h endurance, 1000 cycles
Free fall
—
Class C (90 falls)
Repairability
—
Class C
Main Camera 3 specs
Features
—
Laser AF, color spectrum sensor, Leica lenses, Dual-LED flash, HDR, panorama, 67mm filter ring holder (optional)
Video
—
8K@30fps, 4K@30/60/120fps, 1080p@30/60/120/240/480/960/1920fps, gyro-EIS, Dolby Vision HDR 10-bit rec. (4K@60fps, 1080p)
Quad
—
50 MP + 50 MP + 200 MP + 50 MP
Our Tests 2 specs
Loudspeaker
—
-24.1 LUFS (Very good)
Battery
—
Active use score 16:13h
Selfie Camera 3 specs
Features
—
HDR, panorama
Video
—
4K@30/60fps, 1080p@30/60fps, gyro-EIS
Single
—
32 MP
Similar Comparisons
Common Questions
Which phone is the best in this comparison?
Xiaomi 15 Ultra has the bigger display.
How are the comparison winners decided?
We compare measurable specs (display size, battery capacity, RAM, charging, weight) and price (USD). When two phones tie or data is missing we mark the category "Depends".
Which is more affordable?
The cheaper option is shown as the value winner above. Prices are USD and may vary by region or retailer.