Jan 1st and 2nd Okayplayer Show

Is there any difference between the 1st and 2nd? They will all play the 9:30 club two days in a row?
There's no guarantee that everyone will play the DC gigs.

From the OK site:

"Not all guests will perform at all tour dates"
If somehow someone finds out for a fact that Aesop Rock is going to be at the Jan 2nd show please reply to this. Thanks.