This depends on what kind of fascism and which kind of communism. On paper, both are viable systems. But human nature does not allow for that. If we are talking about Lenin's communism vs Mussolini's fascism, I would say communism is worse. For the offshoots of Nazism and Stalinism, Nazism is worse. But, parodoxicley, to me Stalin was worse than Hitler (maybe because my family is Ukrainian), so I voted fascism. They are both appalling.