Just because a game is made on a bigger budget and by a bigger team, doesn't make it automatically better. Following this "logic", games like Call of Duty would be the best of all time.
DA:O certainly wasn't more "polished" for me than Divinity 2 was, and the graphics and art direction were worse to boot. The game was trying too hard in every way, while Divinity 2 didn't take itself too seriously.