Well I've been having this thought for quite some time now and the reason I'm
starting this thread is because [SPOILERS] I wanted to see if Zoro would deal with Kaku and Jyabura all by himself or if anyone else would butt in. (I.e. Sanji in recent chapters) [/SPOILERS]
From the beginning of the series, Oda introduced the (imo) two main characters of One Piece battle-wise. We were lead to believe that Zoro and Luffy were almost equal in strength and both of them were after a Major Goal – Pirate King and Best Swordsman. As shown later in Whiskey Peak, Luffy and Zoro were pretty close in combat prowess. So I had the feeling that if Zoro was to be a near equal of Luffy he'd have to fight both CP9s standing in front of him, Kaku and Jabs. Judging by their ratings Zoro's advs would have a sum of 4380 and Luffy would battle a 4000 monster,showing that Zoro could rival Luffy. On the other hand, Zoro vs Kaku is not resolved yet and for all we know, Zoro could finish of Kaku without getting beat up for a change and show that he was far above Kaku's skill level thus closer to Luffy if his fight with Lucci proves to be a pain in the ass.
Anyway my point for the thread is, what do you think of the relative difference in power between Luffy and Zoro? Is the Enies Lobby arc the place where Luffy stands above Zoro and defines a boundary in their respective skill? Or does Oda have a secret we don't know as of yet?