I think the big giveaway to why I think this may be a bluff or the same hand is why is he check raising on the turn? What hands is he going to get value out of on that turn after he bet called the flop? You said that it was rainbow board and 332 ain't much of a draw either. The check raise there just seems really out of place and suspicious and weird. I think at best he had pocket 2's (1-2% of the time) and just didn't know how to play it or was hoping you had aces, most likely was a total bluff (90% of the time), and AQ is a maybe the remainder of the time.