Depends, what kind of game I am in, is this an all-in race preflop? AK has more outs, how many players were dealt cards? Any other players call? bet? raise? JJ could be better if other players got dealt A or K and play the hand, JJ can stretch for lower straight, AK is prettier...gee I don't know...I suppose push to shove I take my chances with the 2 over cards.