You didn't provide a time frame, so here are some general observations that span a long period of history
- Russia is predominantly Orthodox
- Much of Europe is either Roman Catholic or Christian
- Although similar, Europe had a system where a peasant was tied to the Noble, whereas in Russia peasants were tied to the land
- You can reasonably argue that if a nobleman expanded his land, peasants could be reassigned throughout the domain, whereas peasants in Russia worked the same land.
- European history is marked with democratic republics, constitutional monarchies, and kingdoms
- Russia is one of the few European nations that embraced communism (the Soviet Bloc was invaded and controlled by Russia, so countries that bordered the Soviet Union and became absorbed into it don't count as freely adopting the theory.)