No they are not the same. The first one is more specific and relates to only you.

"You of all people know that" means you specifically , in particular should know that better than anyone else and it doesn't exclude others from knowing in this case.

They are NOT the same. You all know that = everybody knows this You of all people know that = Out of everyone, you know this because you have first hand experience(it doesn't mean exclude other people from knowing though)

they aren't. but this one seems of equal meaning: 'all you people know that' = 'you all know that.' :)