Yeah, that dictionary article is all in all not bad. It generalizes a lot of course, but that's to be expected, as it is an article in a dictionary, and not a monograph/journal article/academic paper. For example do fascist governments not have to be ruled by a charismatic leader. A ruling party can fulfill the same purpose. A charismatic leader is important, if it is a fascist regime in a totalitarian state, because in that moment the "politization" of the people/the masses plays a much bigger role, thus a charismatic leader is of greater use than for example a big, anonymous party.
There is one grave mistake in there, though. Communism is not a form of totalitarianism. Communism, in theory, is communism or marxism. The totalitarian form of communism is stalinism. And there you also have the “cult of personality” which is a trademark, so to speak, of totalitarianism. But the theoretic construct of communism can never manifest itself in a totalitarian state. The road to communism includes one "passage", where an authoritarian form of democracy is established (the dictatorship of the proletariat), but that's only a transitional stage. Communism itself is, in theory, not totalitarian. It was twisted for example in China or North Korea, but these regimes are de facto not communist. They bear certain aspects of socialism and call themselves communist, but by definition they are not.
The article confuses sometimes theories and forms of government. For example, communism as theory and totalitarianism as a form of government.