One was a carnival barker, a demagogue, and showman who preaches to the choir about all kinds of things that excites them. those people bought tickets to hear him speak, and indeed, he gave them what they wanted.
the other was a deeply insightful and contemplative man who was a scholar, philosopher, and mystic. he said what he meant and what he believed to be true, regardless of what the audience might have thought about it.
there were two Alan Watts as well, of course. he was a public persona just as much as Terrence ever was. More-so actually.