What were the features of the transformations of the 50s in various countries of Eastern Europe?

In the USSR, as in the countries of central Europe at that time, there were a number of differences:

1) In Europe, the principle of a multi-party system was preserved, while in the USSR, on the contrary, only one party operated.

2) In the Soviet Union, there was a complete nationalization of production, in the states of Central Europe, only medium and large enterprises underwent nationalization.

3) In the USSR, private property was abolished, but in Europe it was not.