I actually spoke to leon about this. If you look at the time table between leons actions and ortons, We can start with late Dec to now. Leon is actually in the lead. Currently there only similarities are that they both use the RKO.
As it stands now Randy Orton has some kind of mental disorder, he tries to walk that fine line, but more often than not crosses it. He has confidence in himself, and often times feels some sort of remorse after he snaps.
Leon on the other hand, has paranoia, anger issues, and an inferority complex. Leon feels he has earned the respect of the world, yet he doesn't get it so it makes him angry. On the one hand Leon is accomplished, yet he seems to always be looking over his shoulder since he has that bullseye on his chest known as the World Title.
On 1 end Leon knows he is the man, on the other end he has doubt, so it fuels his paranoia, and makes him lash out, so that he feels justified in his actions.
He never, ever feels remorse for his actions, actually the opposite he feels that when he lashes out he was provoked beyond all measure, not because he has a mental disorder but because he wasnt given the respect due.
I could see where some would say, he is like Randy Orton, but as it stands they are 2 seperate animals.
This would sorta be like calling Trance, Alex shelly, Kang The Rock, or Smythe Edge.