Board Thread:Questions and Answers/@comment-4310945-20140425001334/@comment-27392440-20151227152201

Depending on if the hogyoku made Aizen count as hollow like, Aizen would probably win. Quincy are noted to get weak and die around hollows so if Aizen counted enough as one Yhwach would only have so long, also it's been shown that Yhwach's sense of time was altered by Aizen which is why he was forced to leave before finishing off Ichigo and dragging him back to the quincy fortress (that act of manipulation might even hint about both Aizen's bankai and that when he fused/lost his zanpakuto he gained the ability to use its power himself now), this act of manipulation shows that for whatever reason Aizen is likely immune to Yhwach's precognition and possibly even "the almighty". Even if Aizen stopped evolving and Yhwach kept getting powers, if Aizen has anything close to the raw power he had while fighting Ichigo I also think it's safe to say the number of powers Yhwach has wouldn't matter either