Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | DJI - Osmo Action 3 | GoPro - HERO13 Black |
|---|---|---|
| Waterproof depth | 16 m | 10 m |
| Max video | 4K120 | 5.3K |
| Stabilization | advanced | gimbal-class |
Between the Osmo Action 3 and HERO13 Black, the Osmo Action 3 comes out ahead in waterproof depth, while the HERO13 Black wins on max video / stabilization. Overall, the Osmo Action 3 scores 76.5 and the HERO13 Black scores 81 on our Mars Score.
Which should you buy?
The HERO13 Black edges ahead on the Mars Score (76.5 vs 81), but the 4.5-point gap is small enough that the right pick comes down to which spec advantages matter to you.
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 — 60.00% more. 16 m vs 10 m.
Pick the HERO13 Black if you care most about max video / stabilization. Its strongest claims are max video, stabilization. The single most decisive one: Max video: 5.3K (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: 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: DJI - Osmo Action 3 or GoPro - HERO13 Black?
GoPro - HERO13 Black leads the current Mars Score by 4.5 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 GoPro - HERO13 Black if…
GoPro - HERO13 Black 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 — 60.00% more. 16 m vs 10 m.
Why GoPro - HERO13 Black wins
- ▲Max video: 5.3K (vs 4K120).
- ▲Stabilization: gimbal-class (vs advanced).
Spec comparison
Video
| Spec | DJI - Osmo Action 3 | GoPro - HERO13 Black |
|---|---|---|
| Max video | 4K120 | 5.3Klead |
| Max 4K fps | 120 | 120 |
| HDRⓘ | true | true |
| Log profileⓘ | false | truelead |
Stabilization
| Spec | DJI - Osmo Action 3 | GoPro - HERO13 Black |
|---|---|---|
| Horizon lock | true | true |
| Stabilization | advanced | gimbal-classlead |
Durability
| Spec | DJI - Osmo Action 3 | GoPro - HERO13 Black |
|---|---|---|
| Waterproof depth | 16 mlead | 10 m |
| Weight | 145 glead | 159 g |
| Removable lens | false | truelead |