Recorded both in 4k 25p maximum bit rate available on both.
Put them on a 1080p timeline and zoomed in post by using scale in FCPX.
Slight colour grade applied to both.
Osmo action has the latest firmware as of 30/12/22
The Osmo action 4k shows how the focus issue is awful. The RX0 image in 1080p looks much sharper than osmo's 4k!
![](https://i.ytimg.com/vi/AVX6BS_qaBg/maxresdefault.jpg)