This strikes me as a difference of degree, not of kind (i.e. “sociopath” vs “psychopath.”) More likely, these terms are stages in a progression. Hitler was not elected by campaigning for tyranny, genocide, and total war! He simply echoed and exploited the resentments that many working class Germans felt during the great depression after WW I and the punitive measures imposed on Germany by their former enemies following the Treaty of Versailles. He said he wanted to “Make Germany great again,” in effect, by ridding it of all the “vermin” infesting it. The rest is history. I see no difference at all in basic personality type or manipulative rhetoric between Hitler and Trump! The parallels could scarcely be more apparent.