
DJI
Osmo Action 5 Pro
Great low-light, mic integration; watch out for lens flare.

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I have a DJI Action 1 and a DJI Action 4 and it's leaps and bounds better in image stabilization. I previously had to apply stabilization in iMovie for the Action 1 but the DJI Action 4 footage is just great out of the camera. The v5 and v6 add better low light and ability to use more than 1 bluetooth mic.
I got the Action 1, Action 4 and Action 5. The Action 1 has only one advantage: The minimum focus distance is better and allows to film recipes, dishes and such. I really miss this on the newer action cams with bigger sensors. The Action 4 has the best colors and looks most natural. The Action 5 is the best in anything else, but because of the overprocessed image and the minimum focus distance being too far, I am also not the biggest fan of it. I hope that with the Action 6 they will bring an even bigger sensor (1") and then add a focus system (just like on the Pocket 3). For action footage they could just offer an "action mode" where the focus can not be changed and is as far away as possible (just as it is right now). As long as they dont add proper autofocus that allows to show things closeup, I will stick to using my DJI Pocket 3, despite that i prefer the action camera format, the Pocket 3 with its big sensor and focusing system is just vastly superior.
I have both and for your use case get the action. The pocket 3 is superb but has zero weather resistance. I just bought the action 6 but even my OG action is a good bit of kit. The pocket 3 gimbal will likely break being slung around, the wide angle lens will fall off and get lost like mine after 1 week. And if it rains you’re doomed. Deffo go for the action.
I was hoping to finally see dive footage of the new 6. Im still using Osmo 1. Looks amazing. Very high detail. I like it better than the trendy 360s. I'm thinking about getting it
You could try used dji osmo action 1 . I still use mine , and it doesn't overheat in the Greek summer, but i use it on my helmet so the air on a moving motorcycle might help keeping it cool . On the other hand , action cameras are great as support cameras, b-rolls , wide angle timelapses, but not as a main shooter. The used market is full of great deals!
Second DJI - been running the original Osmo Action 1 for years now with no issues n great vid quality. Had a Drift prior but DJI is way better. Mount either chin (Motorad) or chest (GoPro). To reduce wind noise can use the camera's wind filter, tape the mics, the underwater housing, helmet mic or COMs.
I do both chin mount and chest. Chin mount most of the time. Switch to chest, which eliminates recording head movement, when looking to capture smooth vids. I like my DJI Osmo, have had no issues over the past 4 years.

DJI
Osmo Action 5 Pro
Great low-light, mic integration; watch out for lens flare.

DJI
Osmo Action 4
Reliable, stable, good battery; struggles in low light.

Insta360
Ace Pro 2
Community favorite for low-light, 8K; lacks 10-bit color.

Insta360
Insta360 X5
Replaceable lenses, 360 reframing; poor distant image quality.

DJI
Osmo Action 6
Strong low-light, good battery; aggressive HDR, soft night photos.

Ranked #1
DJI - Osmo Action 5 Pro

Ranked #1
DJI - Osmo Action 5 Pro

Ranked #1
DJI - Osmo Action 4

Ranked #1
DJI - Osmo Action 5 Pro

Ranked #1
DJI - Osmo Action 4

Ranked #1
DJI - Osmo Action 5 Pro