Well, first of all

> it's a perfect copy of you...which isn't the same

I mean that's simply incoherent. That's what perfect means. The only way those two things aren't identical is if you subscribe to religion and the concept of a soul.

As for "realistic", consciousness just is the operation of the brain. If you are able to flawlessly replicate that function, then the subsequent consciousness is, again, identical.

There is lots of room there for deniability; a perfect copy might be impossible or else so tremendously difficult that we don't find it useful—it may also be relatively easy—but unless you can point to why such a copy of you isn't identical to you, I suggest that you consider the possibility that you simply have an emotional resistance to the idea that you aren't inherently unique and inviolate.

We're just information in motion, wherever you wish to house it and however you wish to move it.