Galaxy Watch 8 vs Pixel Watch 4

Galaxy Watch 8 and Pixel Watch 4 are watches both released in 2025, with overlapping phone compatibility. This comparison separates the catalog's listed specifications from missing information and approximate values. It covers 18 fields, including 8 exact differences; it does not choose a winner.

Specifications side by side

Field	Galaxy Watch 8	Pixel Watch 4
Release year	2025	2025
Case sizes	40 / 44 mm	41 / 45 mm
Display	Super AMOLED, Always-On	Curved Actua 360
Brightness	3000 nits	3000 nits
Battery, as listed	Up to 29 hours (AOD) (approx.)	Up to 30 hours (41) · 40 hours (45)
Operating system	Wear OS + One UI Watch 8	Wear OS
Phone compatibility	Android	Android
Cellular connection	eSIM · LTE	eSIM · LTE
Water rating	5ATM + IP68	5ATM + IP68
Glass	Sapphire	Gorilla Glass
Case material	Aluminum	Aluminum
GPS	Dual-frequency GNSS	Dual-frequency GNSS
Maps	No	No
Payment system	Samsung Wallet	Google Wallet
Plan requirement	Not required	Optional
Listed sensors and features	age, Sleep apnea, Body composition (BIA), Blood pressure trend, ECG, HRV, SpO2, Skin temperature	ECG, HRV, Loss of pulse, SpO2, Skin temperature
Safety features	Fall detection, SOS calling	Fall detection, Satellite SOS, SOS calling
Hardware flashlight	No	No

"Not listed" means the catalog has no usable value for that field. It does not mean the watch lacks the feature. Approximate values stay visible but do not support the difference count or numeric deltas.

Where they differ

Case sizes: Galaxy Watch 8 lists 40 / 44 mm; Pixel Watch 4 lists 41 / 45 mm. Keep the variant qualifications when comparing an individual model; this row describes the catalog entry rather than every configuration.
Display: Galaxy Watch 8 lists Super AMOLED, Always-On; Pixel Watch 4 lists Curved Actua 360.
Operating system: Galaxy Watch 8 lists Wear OS + One UI Watch 8; Pixel Watch 4 lists Wear OS. The listed software descriptions are not a guarantee of the software version currently installed on an individual watch.
Glass: Galaxy Watch 8 lists Sapphire; Pixel Watch 4 lists Gorilla Glass. Keep the variant qualifications when comparing an individual model; this row describes the catalog entry rather than every configuration.
Payment system: Galaxy Watch 8 lists Samsung Wallet; Pixel Watch 4 lists Google Wallet.
Plan requirement: Galaxy Watch 8 lists Not required; Pixel Watch 4 lists Optional.
Listed sensors and features: Galaxy Watch 8 lists age, Sleep apnea, Body composition (BIA), Blood pressure trend, ECG, HRV, SpO2, Skin temperature; Pixel Watch 4 lists ECG, HRV, Loss of pulse, SpO2, Skin temperature. This compares the listed feature names, not measurement accuracy, clinical usefulness or availability in a particular country.
Safety features: Galaxy Watch 8 lists Fall detection, SOS calling; Pixel Watch 4 lists Fall detection, Satellite SOS, SOS calling.

What separates these two

Both are 2025 Wear OS watches for Android phones, and the table shows how close they are: 3,000-nit displays, dual-band GNSS, eSIM with LTE, fall detection and SOS on both. What separates them is the sensor list and the safety story. Samsung lists a BIA body-composition sensor, a blood-pressure trend sensor and an antioxidant index; Google lists a loss-of-pulse sensor and satellite SOS over Starlink Direct-to-Cell on the LTE model, free for two years. Samsung lists sapphire glass and a military durability rating; Google lists Gorilla Glass without that rating. Battery labels read up to ~29 hours with the always-on display on the Samsung (approximate), and up to 30 or 40 hours by case size on the Pixel Watch.

Where they are the same

Both list release year: 2025.
Both list brightness: 3000 nits.
Both list phone compatibility: Android.
Both list cellular connection: eSIM · LTE.
Both list water rating: 5ATM + IP68.
Both list case material: Aluminum.
Both list gps: Dual-frequency GNSS.
Both list maps: No.
Both list hardware flashlight: No.

Which one fits you

Galaxy Watch 8 is listed as a watch compatible with Android. Start with that phone requirement before comparing the other rows. The exact differences above are a way to identify which listed specifications matter to your use, not evidence that one model is better in every respect.

Pixel Watch 4 is listed as a watch compatible with Android. Start with that phone requirement before comparing the other rows. The exact differences above are a way to identify which listed specifications matter to your use, not evidence that one model is better in every respect.