Hey there!
I'm gonna keep this short, but if you want to see something longer, take a look at the post I shared on Reddit - https://www.reddit.com/r/GalaxyWatch/comments/ksz0aa/switched_from_wearos_to_galaxy_watch_i_love_it/...
Basically, I decided to switch from my Fossil Sport to a Galaxy Watch Active2, and I didn't really know what to expect because I was switching from Android to Tizen.
Put simply, if you're also a WearOS user tossing up switching, go for it! I reckon you'll love Samsung's Galaxy Watch platform. It's way more responsive than WearOS (even on a decent watch), I've found the battery life to be significantly better - I can now get 48 hours out of my watch instead of 18! Also, app support seems to be better.
Anyway, I said I'd keep it short, so there we go. I love this watch!
All the best, and all the best for 2021!
Tom 
