Hitler clones would be interesting. Hitler didn't have a great early life - would he have been different if he grew up in a healthy household with two loving parents?
[1] Well, at least Steve Guttenberg and Lawrence Olivier got to be in the same film. It was either that or Police Academy XII.
It actually tries (weakly) to claim the opposite, with statements like "Carlos and Wilber both had very similar white mobile phones" and "We are a little bit more ego-centric, bigger flirts."
Nothing about nurture playing a role though.
Project about them: http://drnancysegaltwins.org/bogota-twins-project-gallery
The best reference I can currently come up with is this comment by tokenadult who has a longstanding interest in twin studies:
would it count as a form of rehabilitation?