I would like people to either reconcile this between themselves or stop pretending like they can correct on well-defined term usage.
It is especially odd given that most of these men were both well-read and wrote a lot about their intellectual commitment to communism.
At that point, it's better to start referring to Marx's academic theories as 'proto communism' or 'communist utopianism' .... the word 'communism' already has a tarnished legacy and it is further solidified by the convergent outcomes from each of those aforementioned regimes.
The fact is whenever Communist took over a country, they created mostly the same structure. And its the only form of socialism/communist that existed in a realistic long term setting.
Everything else is just theoretical talking about what true socialism and true communism really are depending on the subculture.
Or you know the whole part of the history book where 20th century communists called themselves socialists too, least of which the Union of Soviet Socialist Republics (USSR)...
Lenin was in the Russian Social Democratic Labour Party. China calls itself "Socialism with Chinese characteristics." North Korea is an "independent socialist state." Ho Chi Minh's roots were in the Socialist Party of France before being a founder of the French Communist Party.