hand 1 : i disagree that he's not going to play big hands fast here, especially from villain's description. But floating this flop is ok because you can rep lots of stuff on later streets and this is a perfect turn to bet (big as well) on when checked to. I would imagine he's betting the turn with both a straight and sets and maybe he would try to pot control kq/a10/aj and give up with his air. When you check the turn though i think you have to fold river because you look pretty desperate to get to showdown so i imagine his betting range is 2pair + on the river.

hand 2: pf 4x is standard in bvb. I'd bet bit bigger on flop and the turn is close. The only draws we're ahead of are stuff 67s and 89s but i'm not sure they're raising here since they would also have a pair and showdown value. Does he rly do this with kq/kj? I guess if we're going to continue i would call turn and c/call any river but i feel like folding the turn here.