Well, wrestles typically only come in three or four different shapes, sizes, and heights, so it's hard to differentiate yourself too much if that's what you mean. I don't think their personalities or skills are exactly the same, but even if they were, wrestlers have been reinventing their in-ring persona since the first squared circle came to be.
MJF needs to learn some new phrases and comebacks. I love his gimmick, but it's getting stale.