Russia had always been poorer than England, France and eventually Germany. Here is a map of the GNP per capita of European countries between 1880 and 1938 https://i.imgur.com/oVivRC1.png Russia and many of the countries that would come to be part of the Soviet Union are much poorer than countries in Western Europe. China was also a poor, war-torn country when it adopted communism, definitely poorer than Japan at the time.
This made me wonder what it would be like it if France, the UK, the US and Japan had adopted communism and worked collectively to defeat capitalism in Russia and China. Due to their relative wealth there would be less corruption in these hypothetically communist countries but beyond that would the supposed inherit flaws of communism manifest themselves or would the wealth, stability and global cooperation of communist states negate these? What do you guys think?
You seem to have a bunch of different questions here. For the questions in the last paragraph you might consider /r/HistoryWhatIf .