Difference between .5/1 and 1/2 (not what you think)

[John Paul]

Hello,
I was looking at the part of poker tracker where it lists all of the different hands and their stats (AA,AKs, AKo etc) and I got to wonder how these differ between levels.

Everyone seems to agree that your winrate goes down as you move up. So how does this look at the hand level? Do premium hands win less often because your better opponents aren't making bad folds? Do you win less per hand as fish aren't chasing hopeless draws? Or do some hands that were marginal just become -EV? Or all three?

I don't have a big database at 2 levels - but if folks out there have them I would be curious to see for a variety of hands the win% and bb/hand. Even if sample sizes won't be the best, it still might be interesting.

Thanks
John Paul