User blog comment:Knight.angelx/Can Zoro ever surpass luffy?/@comment-1738605-20100122211819

I think the only real way for them to compare their powers would be to fight, which has not been seen in canon. I think right now with Zoro's emerging Asura powers (and maybe even Haki or a similar mental-eqsue as was shown on the Archipelago) he could be compared quite close to luffy.