User blog comment:D.Dragon123/What we DON'T like about One Piece./@comment-4899461-20130110000749/@comment-4164499-20130110171522

There is difference between Robin and Zoro.

Zoro is the first mate, one of the strongest characters in OP and have an insane endurance. Robin dosen't-.-

Obviously would Robin not compete with Mihawk or Kuma.