It sort of happens naturally when identical twins are born. They are really individuals even though they have "identical" DNA. However, if you use other means to deliberately create a "copy" of someone, it is hard to say isn't it? Depending on the method of cloning I think the mitochondria could be different. ALso, epigenetic changes occur as we grow and experience life, in effect "altering" expression of our DNA and writing our history in our genetics. Eve was apparently taken out of Adam, but she was also human, though very different from Adam. A clone might be human, but they are probably less "related" to the originals than identical twins. I wonder what God has to say about this?