Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | DJI - Osmo Action 3 | Insta360 - Ace Pro 2 |
|---|---|---|
| Waterproof depth | 16 m | 12 m |
| Max video | 4K120 | 8K |
| Stabilization | advanced | gimbal-class |
Between the Osmo Action 3 and Ace Pro 2, the Osmo Action 3 comes out ahead in waterproof depth, while the Ace Pro 2 wins on max video / stabilization. Overall, the Osmo Action 3 scores 76.5 and the Ace Pro 2 scores 85.5 on our Mars Score.
Which should you buy?
The Ace Pro 2 is the clear pick on raw spec strength, leading by 9.0 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Osmo Action 3 if you care most about waterproof depth. The biggest gaps in its favor are waterproof depth. The single most decisive one: Waterproof depth — 33.33% more. 16 m vs 12 m.
Pick the Ace Pro 2 if you care most about max video / stabilization. Its strongest claims are max video, stabilization. The single most decisive one: Max video: 8K (vs 4K120).
Both ship with comparable max 4k fps, horizon lock, so those specs do not separate the two — focus on the differences below.
Bottom line: the Ace Pro 2 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: DJI - Osmo Action 3 or Insta360 - Ace Pro 2?
Insta360 - Ace Pro 2 leads the current Mars Score by 9.0 points.The more useful decision is the trade-off behind that result: compare max video, waterproof depth against the way you will actually use the product.
Choose DJI - Osmo Action 3 if…
DJI - Osmo Action 3 has the measurable edge on water depth m.
Choose Insta360 - Ace Pro 2 if…
Insta360 - Ace Pro 2 has the measurable edge on max video, stabilization quality.
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 DJI - Osmo Action 3 wins
- ▲Waterproof depth — 33.33% more. 16 m vs 12 m.
Why Insta360 - Ace Pro 2 wins
- ▲Max video: 8K (vs 4K120).
- ▲Stabilization: gimbal-class (vs advanced).
Spec comparison
Video
| Spec | DJI - Osmo Action 3 | Insta360 - Ace Pro 2 |
|---|---|---|
| Max video | 4K120 | 8Klead |
| Max 4K fps | 120 | 120 |
| HDRⓘ | true | true |
| Log profileⓘ | false | truelead |
Stabilization
| Spec | DJI - Osmo Action 3 | Insta360 - Ace Pro 2 |
|---|---|---|
| Horizon lock | true | true |
| Stabilization | advanced | gimbal-classlead |
Durability
| Spec | DJI - Osmo Action 3 | Insta360 - Ace Pro 2 |
|---|---|---|
| Waterproof depth | 16 mlead | 12 m |
| Weight | 145 glead | 180 g |
| Removable lens | false | truelead |