What do آپ think about this?

I want to write a story that includes clones, How do آپ think the clones should be?

A perfect copy? (Appearence,Powers,Memories and Personality)
A Copy? (Appearence and Personality)
A bad copy? (Appearence)

یا do آپ have any ideas for this?
یا can آپ give me tips on Comicbooks, فلمیں یا Videogames that have a similar concept?