The difference is Conte's entire career thus far has been taking teams up to greatness.
So was Ancelotti's, but the first CL team that comes calling he's off. That's my point, we need stability, someone who can do three or four years and make us European regulars, Nuno has done that twice with unfancied Wolves. How we all know Conte is a great manager, but will be stay longer than Ancelotti ? I doubt it and then we will be in exactly the same position were in now.