Aizen (hougyoku) - who needs KS when you have brute force!
Aizen (KS) - brute force doesn't matter much when you're under hypnosis.
We know Aizen is in the middle of an evolution and he got stronger. What would happen if this new Aizen fought old Aizen who fought other captains?
- New Aizen will be under hypnosis.
- New Aizen will not be able to use KS.
- Old Aizen will also have hougyoku in his chest.
Also take the overconfidence, carelessness and arrogance of new Aizen into account.
KS aizen would win..
he would be able to deduce the arrogant new form and be able to confuse it.