Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | GoPro - HERO13 Black | DJI - Osmo Action 4 |
|---|---|---|
| Waterproof depth | 10 m | 18 m |
| Max video | 5.3K | 4K120 |
Between the HERO13 Black and Osmo Action 4, the HERO13 Black comes out ahead in max video, while the Osmo Action 4 wins on waterproof depth. Overall, the HERO13 Black scores 81 and the Osmo Action 4 scores 80.8 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (81 vs 80.8). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the HERO13 Black if you care most about max video. The biggest gaps in its favor are max video. The single most decisive one: Max video: 5.3K (vs 4K120).
Pick the Osmo Action 4 if you care most about waterproof depth. Its strongest claims are waterproof depth. The single most decisive one: Waterproof depth — 80.00% more. 18 m vs 10 m.
Both ship with comparable max 4k fps, stabilization, 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: GoPro - HERO13 Black or DJI - Osmo Action 4?
GoPro - HERO13 Black leads the current Mars Score by 0.2 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 GoPro - HERO13 Black if…
GoPro - HERO13 Black has the measurable edge on max video.
Choose DJI - Osmo Action 4 if…
DJI - Osmo Action 4 has the measurable edge on water depth m.
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 GoPro - HERO13 Black wins
- ▲Max video: 5.3K (vs 4K120).
Why DJI - Osmo Action 4 wins
- ▲Waterproof depth — 80.00% more. 18 m vs 10 m.
Spec comparison
Video
| Spec | GoPro - HERO13 Black | DJI - Osmo Action 4 |
|---|---|---|
| Max video | 5.3Klead | 4K120 |
| Max 4K fps | 120 | 120 |
| HDRⓘ | true | true |
| Log profileⓘ | true | true |
Stabilization
| Spec | GoPro - HERO13 Black | DJI - Osmo Action 4 |
|---|---|---|
| Horizon lock | true | true |
| Stabilization | gimbal-class | gimbal-class |
Durability
| Spec | GoPro - HERO13 Black | DJI - Osmo Action 4 |
|---|---|---|
| Waterproof depth | 10 m | 18 mlead |
| Weight | 159 g | 145 glead |
| Removable lens | truelead | false |