Basically there are none.
Having said that the October Revolution In Russia was the greatest event in human history - Why? because for the first time in history the majority had the power. Unfortunately for various reasons including the failure of the German Revolution of 1918 Russia was left isolated and, after the death of Lenin and the forced exile of Trotsky a bureaucratic elite developed. This elite usurped power. Nevertheless the benefits of the planned economy can be seen in the defeat of nazi germany, the space race, medicine, for example, because the profit motive was not paramount. The former Warsaw pact, China and Cuba developed basically in the image of Moscow.
Socialism to exist and develop needs democracy the same as the human body needs oxygen. Capitalism on the other hand exists in Taliban controlled Afganistan, Saudi Arabia and every other despotic tyranny you can think of