User blog comment:Xilinoc/Ch. 608 - whatever the title of this one is/@comment-1351982-20141204135940/@comment-5693502-20141204212417

You're actually comparing Kenpachi to the leader of the Zero Division ? I doubt anyone from the Gotei 13, bar Yamamoto before his death, would've been anywhere close to Oshō.

Not to mention Oshō has a Kidō-type zanpakutō while Kenpachi's is only a melee-type. The difference in power from that alone is clear enough.

Oshō is the grand-daddy of badass; his descendants need a few centuries and a few levels before they're as badass as him.