That may be the case but I am not qualified to say one way or another.
However, it is the case that all psychopathic / sociopathic individuals remain undiagnosed as such until the time as they have been diagnosed. Surely they do not suddenly become psychopathic / sociopathic but have always been so but have remained undiagnosed.
Given the problem what has emoting got to do with psychopathic / sociopathic tendencies?
A question .... would Adolf Hitler (a man who emoted so well a whole nation where inspired by him and elected him to power by the democratic vote) be classed as a psychopath / sociopath?
I would have thought that 27+ stringent test by eminent psychologists would have thrown up at least a hint of some sort of personality disorder or mental health disorder but in fact nothing has ever showed up. I don't understand you question about emoting, one of the main features of psychopathy/sociopathy./narcissism is the inability of people suffering these disorders to emote.
Adolf Hitler knew how to press the right buttons addressing a crowd and was no doubt a great manipulator do you need to be a psychopath to be a megalomaniac? He had other people, thugs ?psychopaths? to do his dirty work therefore we aren't sure whether he personally could emote or not and he was never tested for psychopathy, on the other hand Jeremy Bamber has been.