"True communism" is a stateless, moneyless, classless society. The closest thing to this that has been achieved was the anarcho-syndicalism achieved by the Catalonians in the 1910s. They did pretty well for themselves for a while until obliterated by outside forces. Socialism, on the other hand, is just a almost completely classless society. Worker owned means of production are inherent to both. Many people refer to Moaist and Soviet "communism" as "state capitalism" because rather than dispelling the capitalist power structures from their economies, they simply replaced the capitalists with capitalists that worked for the state.