Both will have, isn't it a huge coincidence that Luffy, Zoro, Sanji and Usopp are the characters that were emphasized the first time CoC was used in the series?
Isn't it also a coincidence that Luffy, Zoro, Sanji and Usopp in that same arc (sabaody) were the only characters that directly attacked the tenryuubitos?
But to answer the question, between the two it is obvious that Sanji has more of the qualities of a king.
> Leading the crew in Luffy's absence dozens and dozens of times.
> Leading and encouraging groups for certain difficult missions
> Use your charisma to turn enemies into allies (several times too)