It is different in the sense that restricting free speech is part of the communist theory/ideal, while not a requirement from capitalism. Was the restriction on communism inth U.S. in the 50s the will of the majority of the people?

My point was, restricting free speech is indeed part of communism, but be careful before judging the system in relations to other systems based on that small piece of information. It's easy to start spewing "communism = evil" because we've been told so many times, and just use any small piece of information to justify our position, rather than having a hard look, not only at communism, but all the systems in place, both their theory and applications.