Preflop Probability

[mistrpug]

I was wondering...

Two players all-in before the flop for whatever reason. What two hands would make for the largest possible preflop advantage for one over the other? In other words, what's the best (and worst for the other hand) possible situation to be in preflop? Thanks.

[Nottom]

I belive it is AA vs A9 with the 9 of a suit in tha AA.

http://twodimes.net/h/?z=287545
pokenum -h as ac - ad 9s
Holdem Hi: 1712304 enumerated boards
cards win %win lose %lose tie %tie EV
As Ac 1598785 93.37 89199 5.21 24320 1.42 0.941
9s Ad 89199 5.21 1598785 93.37 24320 1.42 0.059

Of course being a 20-1 favorite hasn't seemed to mean much whenever I'm in this spot during a tourney.

[ZeeJustin]

Result
http://twodimes.net/h/?z=28758
pokenum -h ks kc - kh 2c
Holdem Hi: 1712304 enumerated boards
cards win %win lose %lose tie %tie EV
Ks Kc 1612287 94.16 73825 4.31 26192 1.53 0.949
2c Kh 73825 4.31 1612287 94.16 26192 1.53 0.051