Currently playing WotR at the moment (Act 4), I find it hard to compare it to BG3 since we're comparing a full game to a mere Act I prologue.
So far I'd say the main distinction between the games (to me) would be about the dialog/gameplay responsiveness: I have a lot of expectations on BG3 dialogs to adapt depending of your choice. I like the idea to experience the game like a an "interactive RPG book" (like Choice of Games interactive stories). WotR is intense and kinda maximize all things in a classical way, but it's classic. Dialogs are numerous but you can spam the choices you're given for a response knowing it's linear. But what it does, it does perfectly.
What I saw of BG3 make me hope we go beyond this linearity in terms of dialogs and gameplay (though for WotR I expect that the different mythic paths will change my experience as well).
Also WotR feels like a game that want to be as tabletop a game can be in terms of character skills customisation and fights. Larian chose to make the experience to feel more organic.
I never was disappointed by Larian so I'm not worried about the final result. If they can do as good as D:OS 2 i'll be happy.
That aside, I love that Owlcat Games decided to make a game like: - How much epicness do you want? - Yes.
Both studios love making their games and we can see it when we play.
