User blog comment:Staw-Hat Luffy/Too Many Participants/@comment-6971349-20130404143154/@comment-14885023-20130404225941

the WB comanders are like the SS captains though not equal, they are the all roughly in the same strenght set, except for some of the more senior members like Marco, Jozu, Vista and Ace, or in SS's case Yamamoto, Unohana, Aizen and Shunsui.