Looks like it is time for a battle of heavy weights here. Neither of these fighters ended up being the final boss of their respective series but they were pretty close. Both fighters have some good regenerative abilities and their physical abilities are off the charts. The reason why Aizen wins this round is mainly thanks to his Xenomorph form that he got from the Hogyoku. In his final mode I just don’t see Obito being quite fast enough to stop him. Both of their illusions are thrown out of the picture for this fight so it all comes down to their abilities. I think it’ll be a pretty epic fight for sure, but one where I’d put my money on Aizen. Aizen wins.