Answer:
Not only was the Soviet Union communist, they were totalitarian, meaning all the power was with the rulers. The United States was capitalist which meant that people could own land and businesses and compete for themselves. This led to a stark contrast between poor and rich.
Or
A major political difference between the US and USSR was that America was capitalist, while Russia was a communist. Also, they had different lifestyles, America had freedom and a two-party democracy, while Russia had a secret police and a one-party state