Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Huawei - Watch Ultimate | Garmin - Venu 3 |
|---|---|---|
| Weight | 76 g | 47 g |
| Display size | 1.5 " | 1.4 " |
| Water resistance | 10 ATM | 5 ATM |
Between the Watch Ultimate and Venu 3, the Watch Ultimate comes out ahead in display size / water resistance, while the Venu 3 wins on weight. Overall, the Watch Ultimate scores 71.5 and the Venu 3 scores 74.9 on our Mars Score.
Which should you buy?
The Venu 3 edges ahead on the Mars Score (71.5 vs 74.9), but the 3.4-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Watch Ultimate if you care most about display size / water resistance. The biggest gaps in its favor are display size, water resistance. The single most decisive one: Display size — 7.14% more. 1.5 " vs 1.4 ".
Pick the Venu 3 if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight. The single most decisive one: Weight — 29.00 g less. 47 vs 76.
Both ship with comparable battery life, ecg, cellular, 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: Huawei - Watch Ultimate or Garmin - Venu 3?
Garmin - Venu 3 leads the current Mars Score by 3.4 points.The more useful decision is the trade-off behind that result: compare display size against the way you will actually use the product.
Choose Huawei - Watch Ultimate if…
Huawei - Watch Ultimate has the measurable edge on display size in, water resistance atm.
Choose Garmin - Venu 3 if…
Garmin - Venu 3 has the measurable edge on weight g.
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 Huawei - Watch Ultimate wins
- ▲Display size — 7.14% more. 1.5 " vs 1.4 ".
- ▲Water resistance — 5.00 ATM more. 10 vs 5.
Why Garmin - Venu 3 wins
- ▲Weight — 29.00 g less. 47 vs 76.
Spec comparison
Design
| Spec | Huawei - Watch Ultimate | Garmin - Venu 3 |
|---|---|---|
| Case size | 48.5 mmlead | 45 mm |
| Weight | 76 g | 47 glead |
| Case material | titanium | stainless steel |
| Water resistanceⓘ | 10 ATMlead | 5 ATM |
Display
| Spec | Huawei - Watch Ultimate | Garmin - Venu 3 |
|---|---|---|
| Display size | 1.5 "lead | 1.4 " |
| Always-on display | true | true |
| Peak brightnessⓘ | 1000 nits | 1000 nits |
Health & Fitness
| Spec | Huawei - Watch Ultimate | Garmin - Venu 3 |
|---|---|---|
| ECG | true | true |
| SpO2 | true | true |
| Temperature sensor | true | true |
| Sleep tracking | true | true |
| Blood pressure | false | false |
Battery & Connectivity
| Spec | Huawei - Watch Ultimate | Garmin - Venu 3 |
|---|---|---|
| Battery lifeⓘ | 336 h | 336 h |
| GPS | true | true |
| Cellular | false | false |
| NFC | true | true |
| OS | HarmonyOS | Garmin OSlead |
Frequently asked
Which has longer battery life, Watch Ultimate or Venu 3?+
Venu 3 lasts 336 hours vs 336 hours.
Do Watch Ultimate or Venu 3 support ECG?+
Both support ECG.
Which has cellular, Watch Ultimate or Venu 3?+
Neither offers cellular.