Hand 1 - I'd call down very often without any good reads. He can definitely be raising some pair hands here for value/protection. He might also c/c a good portion of his sets on such a dry flop.

Hand 2 - This VERY strongly depends on what happened in the previous hand I think. So hard to say. If you caught him bluffing, I'd be more likely to fold here or call and play it more slowly, since ppl don't run big bluffs two times in a row often.