Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Garmin - Venu 4 | Google - Pixel Watch 3 (45mm) |
|---|---|---|
| Battery life | 264 h | 36 h |
| Peak brightness | 1000 nits | 2000 nits |
| Weight | 45 g | 37 g |
| Cellular | false | true |
Between the Venu 4 and Pixel Watch 3 (45mm), the Venu 4 comes out ahead in battery life, while the Pixel Watch 3 (45mm) wins on peak brightness / weight. Overall, the Venu 4 scores 73.6 and the Pixel Watch 3 (45mm) scores 69.5 on our Mars Score.
Which should you buy?
The Venu 4 edges ahead on the Mars Score (73.6 vs 69.5), but the 4.1-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Venu 4 if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. The biggest gaps in its favor are battery life. The single most decisive one: Battery life — 633.33% more. 264 h vs 36 h.
Pick the Pixel Watch 3 (45mm) if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. Its strongest claims are peak brightness, weight, cellular. The single most decisive one: Peak brightness — 100.00% more. 2000 nits vs 1000 nits.
Both ship with comparable ecg, display size, spo2, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Garmin - Venu 4 or Google - Pixel Watch 3 (45mm)?
Garmin - Venu 4 leads the current Mars Score by 4.1 points.The more useful decision is the trade-off behind that result: compare battery life against the way you will actually use the product.
Choose Garmin - Venu 4 if…
Garmin - Venu 4 has the measurable edge on battery life h.
Choose Google - Pixel Watch 3 (45mm) if…
Google - Pixel Watch 3 (45mm) has the measurable edge on peak brightness nits, weight g, has cellular.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Garmin - Venu 4 wins
- ▲Battery life — 633.33% more. 264 h vs 36 h.
Why Google - Pixel Watch 3 (45mm) wins
- ▲Peak brightness — 100.00% more. 2000 nits vs 1000 nits.
- ▲Weight — 8.00 g less. 37 vs 45.
- ▲Has Cellular.
Spec comparison
Design
| Spec | Garmin - Venu 4 | Google - Pixel Watch 3 (45mm) |
|---|---|---|
| Case size | 45 mm | 45 mm |
| Weight | 45 g | 37 glead |
| Case material | aluminum | aluminum |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Display
| Spec | Garmin - Venu 4 | Google - Pixel Watch 3 (45mm) |
|---|---|---|
| Display size | 1.4 " | 1.4 " |
| Always-on display | true | true |
| Peak brightnessⓘ | 1000 nits | 2000 nitslead |
Health & Fitness
| Spec | Garmin - Venu 4 | Google - Pixel Watch 3 (45mm) |
|---|---|---|
| ECG | true | true |
| SpO2 | true | true |
| Temperature sensor | true | true |
| Sleep tracking | true | true |
| Blood pressure | false | false |
Battery & Connectivity
| Spec | Garmin - Venu 4 | Google - Pixel Watch 3 (45mm) |
|---|---|---|
| Battery lifeⓘ | 264 hlead | 36 h |
| GPS | true | true |
| Cellular | false | truelead |
| NFC | true | true |
| OS | Garmin OSlead | WearOS |
Frequently asked
Which has longer battery life, Venu 4 or Pixel Watch 3 (45mm)?+
Venu 4 lasts 264 hours vs 36 hours.
Do Venu 4 or Pixel Watch 3 (45mm) support ECG?+
Both support ECG.
Which has cellular, Venu 4 or Pixel Watch 3 (45mm)?+
Pixel Watch 3 (45mm) offers a cellular variant; Venu 4 is Wi-Fi only.