BG3 is a story-driven d20 RPG experience. Lots of questing, dialogue, characterization, etc. It is an ABSURDLY polished game where you can miss entire sections of it unless you listen very carefully.
DD2 is an action-driven rpg. If you want to be fighting more than talking then this is your jam. But it's also BRUTAL when it comes to the travel and difficulty. You'll spend most of the game running from place to place and trying not to die.