A communist country has never existed and never will so we will never know.

Communism is a lovely idea on paper but a complete utopia due to human nature. We are nearly all motherfuckers who if given the chance will try to obtain more power or more wealth than our peers in a group of any size. Thus you can't have all citizens of a given country agree on abandoning private ownership and sharing wealth, work and power in equal terms. Any government that pretended to do that was just faking it and forced their citizens to pretend.