It seems that this long discussion has sparked a lot of unnecessary controversy. Vegeta defeats Aizen easily, and I’ve read all the comments, and it seems that some information was hidden by some Bleach fans so the truth wouldn’t appear, but fortunately I followed both works.
First, we have Goku in Z who was able to resist illusions and they no longer affected him, and that was only in Z. In the Moro arc in Super, Moro tried to put Goku into an illusion, but it didn’t affect Goku at all, and at that moment Goku told him that illusions don’t affect him, and that’s Goku’s own statement to Moro. Aside from that, Goku in Z alone can defeat characters who manipulate illusions, and it doesn’t work against him, and Vegeta in the manga is at the same level of power as Goku and far stronger than Z Goku in an unimaginable way, of course. Therefore, the whole illusion argument and putting him under illusions is no longer relevant and has no importance in a fight.
Ichigo in the manga is no longer affected by Aizen’s illusion, and Aizen himself is surprised by this, since Ichigo himself wasn’t affected by the illusion and Aizen can no longer influence him with it. Aizen even told him that he knows he wasn’t affected by the illusion, which means Ichigo’s power alone surpasses and successfully transcends the illusion and it no longer affects him at all. And as we know, Vegeta is far stronger than Ichigo in terms of power, at the 2-C level.
In the direct confrontation between Aizen and Ichigo in the Dangai form, Aizen, even with all his power, couldn’t even sense Ichigo’s power and couldn’t withstand Ichigo at all, even in his monster form, and illusions were no longer useful against Dangai Ichigo in the first place. And as we know, without repeating what we already mentioned, Vegeta is stronger than Dangai Ichigo and manga Ichigo. That means Dangai Ichigo is no longer affected by illusions, and abilities like Hado 90 are no longer effective. We even saw Ichigo destroy Hado 90 with just his hand, and it didn’t affect him at all, even though Ichigo’s power was 3-B or less at that moment—so how can you say that a technique like Hado 90 would affect Vegeta??? And in the Horn of Salvation form, we saw Ichigo not affected by illusions at all as I said before, and there was dialogue between them and so on…
So simply, Vegeta crushes Aizen in a second.