Are you talking about the sense of humor? BG1 and BG2 were overflowing with low brow humor and silly jokes. Everything from Minsc in general, Xan depressing Ajantis, Larry, Darryl and Darryl, "You wouldn't kill a man with a wife and children", "I can take on Drizzit with both arms tied behind my ... ghaarrkh!", all of Tiax, "Hey, don't click me! I don't want any trouble!", and hundreds of others.I'm sure Larian can make a great Larian game. That doesn't mean I find it a good BG game. If I want to read funny and extremely empathic Discworld fantasy I don't buy a GRR Martin book.
I would put BG1 and BG2 somewhere in the middle. Like:
(Silly) Dragon Commander > DOS 1 > BG1 > Beyond Divinity > Ego Draconis > BG2 > Divine Divinity > DOS 2 (Less Silly)
And when I say (Less Silly), we're still talking moderately silly.