Obviously the original one is.
Whether the clone also things that it's me doesn't make it any more so, than if a paranoid person thought it was Napoleon would make them Napoleon.
After the first 'Clone Settlement' and the pains of splitting someone's belongings between the same person; it would have to be made illegal. No other way around it.
How do you tell which one is the original? Atoms don't have labels. But atom-level copy isn't possible. Say we made the scan at large enough scale that has fidelity but it isn't identical.
Reality doesn't care about the labels. One of the two pre-existed, which is the original.
>How do you tell which one is the original? Atoms don't have labels.
That's a problem regarding our knowledge. There's still an original, regardless if we know which or not.
There's an original even regardless whether the original has a way to prove to themselves they are so (as opposed to simply believing they are, which the clone would believe too).