I really don't remember which was which (yes I said *was because let's face it they're a thing of the past now). But I do remember one being a complete dick just for the sake of being a dick and just embraced the out-of-control rock star image, the other one was.....also kind of a dick? But did value his artistic integrity. So yes, I think your typings are legit.
Here's another shot at One Piece MBTI, I've refined a few types overtime, I'll focus on just the straw hats for now and update the rest later.
Straw Hat's MBTI