Mojo
Mostly harmless
Assuming co existence it would be occupying separate points in spacetime and therefore having different frames of reference
Something mono zygotic twins [ which are the closest example of a carbon copy that exists in actual reality ] also experience
That is not the sort of difference that Jabba claims there is, or the sort of copy, equivocate though he may. He's talking about a perfect replica, not a twin that has experienced a different environment, and he claims that there would be a difference in nature between him and the replica, despite them being materially identical.
He has completely failed to explain what that difference would be, or how and why it would arise.