[shant]

I'm gonna say Hand 1. These are boards you're more likely to be bluffed on, as your opponent will think it is less likely you've hit anything, and that you're afraid of the 9. He may have a weaker 8 and was waiting to raise as a bluff, or he maybe even have overs or smaller pairs. I call that one down.

Hand 2 is a rougher board for your opponent to bluff. He has to know you have an A, and most players won't lay down top pair to the checkraise. Unless he has a read on you as a strong player who makes good laydowns, he is getting called down by most opponents and needs to have an 8 or better A to make this play.

So, I say Hand 1 is the bluff.