Board Thread:VS Debates/@comment-26363797-20170309234051/@comment-5898946-20170311155322

It comes down to two things. First, the arena. If we're talking just an empty metal dome with nothing else in it, for example, Aang has no earth or water to use Earthbending or Waterbending with, and that restricts him, but doesn't pose a problem for Jack.

Second, what point in their respective time streams. If we're taking Aang right when he came out of the iceberg for example, Jack would utterly destroy him. If we take Aang as an adult as seen in flashbacks from Legend of Korra, that's going to be a significantly more challenging fight for Jack. On Jack's end, at the very beginning of the series (like the second eipsode), he was a little more foolhardy, and by the end, he's more cautious.

Overall, I think Jack wins this fight in the majority of match-ups, mainly due to his varied training and his greater amount of experience, not to mention the crazy feats we've seen him perform, as mentioned above by Strunton.