Screen size
K15sWinner: 6.6"+77%
Watch X21.5"
Quick verdict
K15s leads the measured specs 17-3.
Measured wins
K15s
17
spec wins
Overall winner
Ties
2
equal specs
Watch X2
3
spec wins
Screen size
Technology
K15s
GSM / HSPA / LTE / 5G
Watch X2
No cellular connectivity
2G bands
K15s
GSM 850 / 900 / 1800 / 1900
Watch X2
N/A
3G bands
K15s
HSDPA 850 / 900 / 2100
Watch X2
N/A
4G bands
K15s
1, 3, 5, 8, 28, 34, 38, 39, 40, 41, 42, 48
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
NFC
equal specs3.5mm jack
equal specsSD card
Stereo speakers
Watch X2
N/A
5G bands
K15s
1, 3, 5, 8, 28, 38, 40, 41, 48, 77, 78 SA/NSA
Watch X2
-
Speed
K15s
HSPA, LTE, 5G
Watch X2
No
GPRS
K15s
-
Watch X2
No
EDGE
K15s
-
Watch X2
No
Announced
K15s
2026, October 02
Watch X2
2025, February 20
Status
K15s
Available. Released 2026, October 02
Watch X2
Available. Released 2025, March 28
Dimensions
K15s
159.1 x 75.8 x 8.8 mm (6.26 x 2.98 x 0.35 in)
Watch X2
47.6 x 46.6 x 11.8 mm (1.87 x 1.83 x 0.46 in)
Weight
K15s
205 g (7.23 oz)
Watch X2
49.7 g (1.76 oz)
Build
K15s
Glass front, plastic frame, plastic back
Watch X2
Sapphire crystal front, stainless steel frame, plastic back
SIM
K15s
Nano-SIM + Nano-SIM
Watch X2
No
Other
K15s
IP68/IP69K dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min) Drop resistant up to 1.8m
Watch X2
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
Type
K15s
AMOLED, 1B colors, 120Hz, 800 nits (typ), 1400 nits (peak)
Watch X2
LTPO AMOLED, 2200 nits (peak)
Size
K15s
6.57 inches, 105.0 cm2 (~87.1% screen-to-body ratio)
Watch X2
1.5 inches
Resolution
K15s
1080 x 2372 pixels (~397 ppi density)
Watch X2
466 x 466 pixels (~310 ppi density)
Protection
K15s
-
Watch X2
Sapphire crystal glass
OS
K15s
Android 16, ColorOS 16
Watch X2
ColorOS Watch 7.0 + Wear OS 5.0
Chipset
K15s
Mediatek Dimensity 6360 Max (6 nm)
Watch X2
Qualcomm Snapdragon W5 Gen 1 (4 nm)
CPU
K15s
Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
Watch X2
-
GPU
K15s
Mali-G57 MC2
Watch X2
-
Card slot
K15s
microSDXC
Watch X2
No
Internal
K15s
128GB 6GB RAM, 256GB 8GB RAM
Watch X2
32GB 2GB RAM
Other
K15s
UFS 2.2
Watch X2
-
Dual
K15s
50 MP, f/1.9, 25mm (wide), PDAF Auxiliary lens
Watch X2
-
Features
K15s
LED flash, HDR, panorama
Watch X2
-
Video
K15s
1080p@30/60fps
Watch X2
-
Single
K15s
8 MP, f/2.1, 25mm (wide)
Watch X2
-
Features
K15s
Panorama
Watch X2
-
Video
K15s
1080p@30fps
Watch X2
-
Loudspeaker
K15s
Yes
Watch X2
Yes
3.5mm jack
K15s
No
Watch X2
No
WLAN
K15s
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Watch X2
Wi-Fi 802.11 a/b/g/n, dual-band
Bluetooth
K15s
5.4, A2DP, LE, aptX HD
Watch X2
5.2, A2DP, LE
Positioning
K15s
GPS, GALILEO, GLONASS, BDS, QZSS
Watch X2
GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
NFC
K15s
Yes
Watch X2
Yes
Infrared port
K15s
Yes
Watch X2
-
Radio
K15s
No
Watch X2
No
USB
K15s
USB Type-C 2.0, OTG
Watch X2
No
Sensors
K15s
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Watch X2
Accelerometer, gyro, barometer, compass, heart rate, SpO2, thermometer (skin temperature)
Type
K15s
Si/C Li-Ion 8000 mAh
Watch X2
Li-Ion 648 mAh
Charging
K15s
45W wired, 45W UFCS, 45W PPS, 13.5W PD Reverse wired
Watch X2
7.5W wired
Colors
K15s
Gray, Purple
Watch X2
Lava Black, Summit Blue
Models
K15s
PYE130
Watch X2
OPWWE251
Price
K15s
About 270 EUR
Watch X2
About 300 EUR
Other
K15s
-
Watch X2
No