Screen size
Watch 4Winner: 1.8"+14%
Watch 6 Pro1.5"
Quick verdict
Watch 4 and Watch 6 Pro are close on the measured specs.
Measured wins
Watch 4
5
spec wins
Ties
4
equal specs
Watch 6 Pro
5
spec wins
Screen size
Technology
Watch 4
GSM / HSPA / LTE
Watch 6 Pro
No cellular connectivity
2G bands
Watch 4
GSM 850 / 900 / 1800 / 1900
Watch 6 Pro
N/A
3G bands
Watch 4
HSDPA 900 / 2100
Watch 6 Pro
N/A
4G bands
Watch 4
LTE
Watch 6 Pro
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
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
N/A
Speed
Watch 4
HSPA, LTE
Watch 6 Pro
No
GPRS
Watch 4
-
Watch 6 Pro
No
EDGE
Watch 4
-
Watch 6 Pro
No
Announced
Watch 4
2023, July 12
Watch 6 Pro
2026, September 28
Status
Watch 4
Available. Released 2023, July 12
Watch 6 Pro
Available. Released 2026, September 28
Dimensions
Watch 4
45.3 x 39.1 x 11.2 mm (1.78 x 1.54 x 0.44 in)
Watch 6 Pro
46.3 x 46.3 x 11.6 mm (1.82 x 1.82 x 0.46 in)
Weight
Watch 4
32 g (1.13 oz)
Watch 6 Pro
51 g (1.80 oz)
Build
Watch 4
Glass front, plastic back, plastic frame
Watch 6 Pro
Glass front, stainless steel 316L case or ceramic case, reinforced plastic back
SIM
Watch 4
eSIM
Watch 6 Pro
No
Other
Watch 4
5ATM water resistant (50m waterproof)
Watch 6 Pro
IP68/IP69K dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min) 5 ATM water resistant ECG certified
Type
Watch 4
AMOLED
Watch 6 Pro
Dual-layer AMOLED, 4500 nits (HBM), 5500 nits (peak)
Size
Watch 4
1.75 inches
Watch 6 Pro
1.5 inches
Resolution
Watch 4
390 x 450 pixels (~340 ppi density)
Watch 6 Pro
466 x 466 pixels (~310 ppi density)
OS
Watch 4
MagicOS 7.2
Watch 6 Pro
MagicOS
Card slot
Watch 4
No
Watch 6 Pro
No
Internal
Watch 4
4GB 32MB RAM
Watch 6 Pro
Unspecified
Other
Watch 4
No
Watch 6 Pro
No
Loudspeaker
Watch 4
Yes
Watch 6 Pro
Yes
3.5mm jack
Watch 4
No
Watch 6 Pro
No
WLAN
Watch 4
No
Watch 6 Pro
No
Bluetooth
Watch 4
5.2, LE
Watch 6 Pro
5.4, LE, EDR
Positioning
Watch 4
GPS, GLONASS, GALILEO, BDS, QZSS
Watch 6 Pro
GPS (L1+L5), BDS, GALILEO, QZSS, GLONASS
NFC
Watch 4
Yes
Watch 6 Pro
Yes
Radio
Watch 4
No
Watch 6 Pro
No
USB
Watch 4
No
Watch 6 Pro
No
Sensors
Watch 4
Accelerometer, gyro, heart rate, SpO2
Watch 6 Pro
Accelerometer, gyro, compass, barometer, heart rate, SpO2, blood glucose meter
Other
Watch 4
-
Watch 6 Pro
Cardiac arrest, blood pressure monitoring
Type
Watch 4
Li-Ion 451 mAh
Watch 6 Pro
Li-Po 500 mAh
Charging
Watch 4
-
Watch 6 Pro
Wireless charging
Colors
Watch 4
Black, Gold
Watch 6 Pro
Black, Silver
Models
Watch 4
TMA-L19
Watch 6 Pro
HLO-B19
Price
Watch 4
About 120 EUR
Watch 6 Pro
About 220 EUR