Board Thread:The Panopticon/@comment-24894325-20160708122214/@comment-2162194-20160710161950

Sara II as you have put it is more of a clone with all of Sara's memories, I believe that is what the comment in the Five Companions means, the Sara in that story is not the same body as the one that Steven met on Kembel, it could also mean she is not the officious women she was when she travelled with the Doctor.