What were the features of the transformations of the 1950s in various countries of Eastern Europe?

At that time, the USSR was undergoing a global nationalization of production, in the countries of central Europe, only medium and large enterprises were nationalized. In the European states, the same private property remained, but not in the Union. There was also a difference in the political realm. There was only one party in the USSR, but a multi-party system remained in Europe.