I also like BG3 better than Dragon Ages - but outside presentation and some interface similarities (chain system, hotbar) I don't think games have much in common.
I can’t agree with this more. Dragon Age and BG3 have some superficial similarities, but the way you engage with the games are completely different.
Playing Dragon Age means selecting a path (a quest, a destination, what have you) and then playing through a very linear set of challenges, mostly revolving around several near identical combat encounters. Then you often make some sort of choice in dialogue at the end.
BG3 and DOS2 are far less linear. You are encourage to be creative in how you use abilities and systems to complete challenges. I wouldn’t say DA games are strictly on rails, but they are far more on rails than Larian’s games.