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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 2 | Xiaomi 15 Ultra |
|---|---|---|
| Display size (in) | 1.91 | 6.73 |
| Weight (g) | 35 | 226 |
| Thickness (mm) | 11.60 | 9.35 |
| Chipset | Qualcomm Snapdragon Wear 4100 (12 nm) | Snapdragon 8 Elite |
| OS | Android Wear OS - InternationalColorOS Watch 2.0 - China | Android 15, HyperOS 2 |
Pros & Cons
Oppo Watch 2
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 2
Xiaomi
Xiaomi 15 Ultra
Battery 3 specs
Type
Li-Ion 510 mAh
Market-dependent versions:· Si/C Li-Ion 5410 mAh - Global· Si/C Li-Ion 6000 mAh - China
Capacity
—
5410 mAh
Charging
—
90W wired, 80W wireless
Body 5 specs
Dimensions
46.4 x 38.5 x 11.6 mm (1.83 x 1.52 x 0.46 in)
161.3 x 75.3 x 9.35 mm
Weight
35 g (46mm) / 31 g (42mm) (1.09 oz)
226 g
Build
Glass front, aluminum frame
Glass front, glass-fiber reinforced plastic back or silicone polymer back (eco leather), aluminum frame
SIM
eSIM (market/region dependent)
· Nano-SIM + Nano-SIM· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)
5ATM water resistant
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 b/g/n
Wi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band or tri-band, Wi-Fi Direct
Bluetooth
5.0, A2DP, LE
6.0, A2DP, LE, aptX HD, aptX Adaptive, LHDC 5
Positioning
GPS, GLONASS, GALILEO, BDS
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
AMOLED
LTPO AMOLED
Size
1.91 inches
6.73 inches
Resolution
402 x 476 pixels (~326 ppi density)
1440 x 3200 pixels
Protection
—
Xiaomi Shield Glass 2.0, Mohs level 6
Features 2 specs
Sensors
Accelerometer, gyro, heart rate, compass, barometer, SpO2
Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometer
—
Two-way satellite communication (China model only)
Launch 2 specs
Announced
2021, July 27
2025, February 27
Status
Available. Released 2021, July 27
Available. Released 2025, February 27
Memory 5 specs
Card slot
No
No
Internal
8GB 1GB RAM
256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
eMMC 4.5
UFS 4.1
RAM
—
16GB
Storage
—
512GB
Misc 4 specs
Colors
Star Blue, Platinum Black, Rose Gold
Black, White, Silver Chrome, Green
Models
OW20W2
25010PN30G
Price
About 170 EUR
$ 693.75 / £ 1,295.00 / € 812.34
SAR EU
—
1.00 W/kg (head) 1.00 W/kg (body)
Network 7 specs
Technology
HSPA / LTE
GSM / HSPA / LTE / 5G
2G bands
N/A
GSM 850 / 900 / 1800 / 1900
3G bands
HSDPA 850 / 900 / 2100
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
1, 3, 5, 8, 34, 38, 39, 40, 41 - China
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
HSPA, LTE
HSPA, LTE, 5G
—
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
Android Wear OS - InternationalColorOS Watch 2.0 - China
Android 15, HyperOS 2
Chipset
Qualcomm Snapdragon Wear 4100 (12 nm)
Snapdragon 8 Elite
CPU
Quad-core 1.7 GHz Cortex-A53
Octa-core (2x4.32 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)
GPU
Adreno 504
Adreno 830
Sound 3 specs
Loudspeaker
Yes
Yes, with stereo speakers
3.5mm jack
No
No
—
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.