There is at least one case of parents, told at a very early stage that they're expecting twins, deciding to remove and freeze one of the embryos for later reimplantation, so even with actual identical twins, they can be different ages.

But yes, transferring minds is not something we can do. I'm not sure it's something we'll ever be able to do.

Should it actually become possible, I assume that certain parties would even advocate for the unique life/lives of the clone(s). The argument would be that the clones' chance at life shouldn't be overwritten by other being's attempts at extension of life.

"Ethical minefield" doesn't even begin to cover it!