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Head to head

Samsung Galaxy Watch9 44mmvsGoogle Google Pixel Watch 4 45mm

Released
2026-08-07Samsung Newsroom UK — Galaxy Watch Ultra2 and Watch9, retrieved 2026-09-13
Price
£379Samsung UK store — Galaxy Watch9, retrieved 2026-09-13
Security updates until
Not published by the makerSamsung UK — How to update software on Galaxy Watch, retrieved 2026-09-13
Released
2025-10-09Google blog — Pixel Watch 4, retrieved 2026-09-13
Price
£399Google Store UK — Pixel Watch 4 45 mm, retrieved 2026-09-22
Security updates until
Not published by the makerGoogle Store UK — Pixel Watch 4 specs, retrieved 2026-09-13

0 wins for Galaxy Watch9 44mm0 wins for Google Pixel Watch 4 45mm1 gap borderline1 difference you won’t notice£20 apart at RRP

Verdict: nothing you’d notice between them

On the makers’ published figures, neither the Galaxy Watch9 44mm nor the Google Pixel Watch 4 45mm wins a row by a gap you would notice. One gap is borderline, a difference most people would not notice: case size (44 mm against 45 mm). The difference in weight (case only) is below the threshold you would notice. Both state the same peak brightness. The other 29 rows have no threshold or no direction to judge by, so nobody wins them.

True to scale

Galaxy Watch9 44mm · 46.0 × 43.7 mmGoogle Pixel Watch 4 45mm · 45 × 45 mm

Case outlines from each maker’s published dimensions, drawn to scale. A round case is an ellipse at those figures.

Specifications

A win is marked only where the figures can be ranked and the gap is one you could notice on the wrist. A row the site has no threshold for says whether the two differ, and that it is not ranking them. = marks the same figure on both, ≠ not ranked a difference with no ranking. Every figure carries its source.

Body

SpecificationSamsung Galaxy Watch9 44mmGoogle Pixel Watch 4 45mm
DimensionsDiffers, but not ranked.
46.0 x 43.7 x 8.6 mmOfficial
45 x 45 x 12.3 mmOfficial
Case size
44mmOfficial
45mmOfficial

Marginal — most people won’t notice.

Case shapeSame.
roundOfficial
roundOfficial
Weight (case only)
34gOfficial
36.7gOfficial

You won’t notice this difference.

Case materialDiffers, but not ranked.
Armor AluminiumOfficial
100% recycled aluminiumOfficial
Water ratingDiffers, but not ranked.
5 ATM + IP68 / MIL-STD-810HOfficial
5 ATM, IP68Official

Display

SpecificationSamsung Galaxy Watch9 44mmGoogle Pixel Watch 4 45mm
Display typeDiffers, but not ranked.
Super AMOLED, Full Colour Always On DisplayOfficial
Actua 360 AMOLED LTPO display with DCI-P3 colour, Always-on displayOfficial
Display size
1.47inOfficial
No verified data
Resolution
480 x 480Official
No verified data
Peak brightnessSame.
3000nitsOfficial
3000nitsOfficial
Always-on displaySame.
YesOfficial
YesOfficial

Platform

SpecificationSamsung Galaxy Watch9 44mmGoogle Pixel Watch 4 45mm
Operating systemDiffers, but not ranked.
Wear OS 7Official
Wear OS 6.0Official
ChipDiffers, but not ranked.
Qualcomm SDW6100 (Snapdragon Wear Elite, 3nm, 5 core)Official
Qualcomm Snapdragon W5 Gen 2, Cortex-M55 co-processorOfficial
StorageSame.
32GBOfficial
32GBOfficial
RAMSame.
2GB3rd party
2GB3rd party

Battery

SpecificationSamsung Galaxy Watch9 44mmGoogle Pixel Watch 4 45mm
Battery life (maker's claim)
40hOfficial
40hOfficial

Different test conditions, not ranked.

Battery capacityDiffers, but not ranked.
445mAh3rd party
455mAh3rd party
Charge to 80%
No verified data
30minOfficial
ChargingDiffers, but not ranked.
Fast ChargingOfficial
Quick Charge DockOfficial

Health

SpecificationSamsung Galaxy Watch9 44mmGoogle Pixel Watch 4 45mm
SensorsDiffers, but not ranked.
Samsung BioActive Sensor (Optical Bio-signal Sensor + Electrical Heart Signal + Bioelectrical Impedance Analysis), Temperature Sensor, Accelerometer, Barometer, Gyro Sensor, Geomagnetic Sensor, Light SensorOfficial
Compass, altimeter, red and infrared sensors for oxygen saturation (SpO2) monitoring, multipurpose electrical sensors compatible with ECG app, multi-path optical heart rate sensor, 3-axis accelerometer, gyroscope, ambient light sensor, electrical sensor to measure skin conductance (cEDA), far-field skin temperature sensor, barometer, magnetometerOfficial
ECGSame.
YesOfficial
YesOfficial
Blood oxygen
No verified data
YesOfficial
Skin temperatureSame.
YesOfficial
YesOfficial
GPSDiffers, but not ranked.
L1+L5 Dual-Frequency GPS (GPS, Glonass, Beidou, Galileo)Official
Dual-frequency GPS: GPS, Galileo, GLONASSOfficial

Connectivity

SpecificationSamsung Galaxy Watch9 44mmGoogle Pixel Watch 4 45mm
Cellular modelSame.
YesOfficial
YesOfficial
Cellular model price
£429Official
No verified data
UK networks with eSIMSame.
EE, Vodafone3rd party
EE, Vodafone3rd party
Wi-FiDiffers, but not ranked.
802.11a/b/g/n 2.4GHz+5GHzOfficial
802.11a/b/g/n/ac/ax 2.4 GHz, 5 GHzOfficial
BluetoothSame.
6.0Official
6.0Official
NFC paymentsSame.
YesOfficial
YesOfficial

Compatibility

SpecificationSamsung Galaxy Watch9 44mmGoogle Pixel Watch 4 45mm
Works withDiffers, but not ranked.
Android 13.0 or higher and with more than 1.5GB of memoryOfficial
Works with most phones running on Android 11.0 or newer. Requires a Google Account and the Google Pixel Watch app.Official
CompatibilityDiffers, but not ranked.
Android; some features need a Samsung phoneOfficial
Android; some features need a Google phoneOfficial
3 attributes neither watch has a sourced figure for

Strap width · Display area · Blood pressure. Rows appear as sources are cited — a gap in our data, not a statement about either watch.

The pairs a buyer of either watch would also weigh. Any two watches in the catalogue can be compared from the chooser.