Firstoff, good question. Especially since I feel like I may answer this type of question differently, depending upon when asked. Which may not be correct, but oh well. Anyway, I think I'd more often go with the AKsuited. Mostly because I'm usually gonna raise both of the hands, and when I get action with JJ and see those dreaded higher cards on the flop....you know the feeling. I like feeling like I have a chance of drawing to the nuts with the AK suited, as well as obviously hoping to flop a pair or better first.
Both are premium hands. If you open UTG with JJ and you get some action in front, a 3-bet and a 4-bet i advise you to fold cause if the flop come all rags you'll be in trouble and may not fold your hand thinking that Villain has TT or 99 or trying to hit some straight or set at turn and river thus spewing more chips.
AKs is great hand to 4-bet all-in with, especially UTG you could made some hands folds like 88+ and if facing an all-in it's a flip.
Are we 9/10 handed or 5/6 handed? Tournament or cash game? Stack sizes around the table? What are the stats on the other players? Do I have someone who is going to be easy to play unimproved JJ on the flop correctly against out of position? Is the table loose/passive and I'll be playing this multi-way?
Which hand I prefer depends on many factors.
I get no respect. When I move all-in, people from other tables call.
Which of these hands would you rather play under the gun and why?
Clearly it's AKs because JJ is not a convincing hand, as I saw earlier in a chat, JJ is really a love / hate hand, conducive to coming at times when you have a lot of BB's, but when you're in a precarious situation in a tournament the AKs fits much better.
JJ is more convincing on the preflop, but this is where their advantage ends, there is a 57% probability that an overcard will fall on the flop, and how will you play the post-flop? If the opponent has a pair stronger than yours, you only have 2 outs (a rough calculation, because there are possible streets and flushes on one pocket card).
The pair is ready, but it is more difficult to part with it and this leads to greater relationships with this pair.
With AK, it is easier to fold the re-raise of our c-bet, plus it dominates a large number of hands that can call our raise.