I ran into issues while exporting (rendering) with kdenlive, where you will notice available formats being different between the Mac version of kdenlive and the Linux one.
But to me it was a matter of compatibility, I don't really care as long as I get useable files of sufficient quality, so I didn't pay much attention, works-for-me style I'm afraid.
Same applies to hardware vs software encoding/decoding - the M chipset is quite powerful enough you shouldn't have to worry about it in a pro context where encoding is something you gotta do and it's doing it reasonably fast.
Just try it out, it doesn't kill your mac install, and you can compare.
Eww. I ran into similar trying to build a meson app on Asahi. Fuck that. Since the point of the Fedora-Asahi partnership is to have a max of stuff upstream, I guess it leaves you with whatever fedora is shipping - which may not be good enough for you.
Again, depends in your use case; since the horrible business of having a full ffmpeg on one machine is done, you can use any sync software between them & not care further. I use syncthing to keep my mastering device (mbp 14, Asahi) in sync with a playback machine and a backup machine.
But it is my use case: I use different, dedicated devices for dedicated tasks as to spread out wear, risks and improve redundancy in case of failure.