This is Yui, in the next post I'll show a composite of what a true clone of Yui would resemble.
Wait hol up, it's been a while since I watched Eva, but wasn't Rei a combination of Angel and Human genetic material? If so then she isn't a clone, she's a hybrid creature. Only new Reis would be clones.
Composite sketch of what Rei would look like if she was a best girl.
Checks out to be honest.