I identify with some forms of restoration but not others. If I cut off all my hair and then it grows back, I have been "restored" without having ever gone away. If I get vaporized now, and then a trillion years later I happen to live again as a Boltzmann brain, that's clearly a copy. There are many conceivable transformations between those two extremes, and as I said to Risto in my first reply, I believe I am something, and that consequently there is an objective fact as to whether a particular transformation just changes me, or whether it actually destroys me (though a substitute may later be created). I think cryonics (and uploading) fall into this latter category. It's not certain but it's likely.