Or is it more stable?

I don't have the Steam version but can say that I've not had one crash yet with my GOG version and I've been playing every day since it was released here. I used the offline installer (don't use Galaxy at all) and have quite a few mods that I installed via Mod Organiser 2. Solid as a rock although the load times sometimes leave a lot to be desired.

Maybe you like this:

https://www.nexusmods.com/fallout4/mods/74841

I generally found it to be more stable with better performance - however - vault 88 and some of the other dlc had horribly decreasing performance (felt like some kind of memory leak) which I didnt experience with the steam version.

Thanks, I'll definitely try this out.