How were the political ideologies of the United States and the Soviet Union different?

The United States based its political system on an elite ruling class, while the
Soviet Union developed a
republican system.

The United States based its political power on a single powerful executive, while
the Soviet Union had a seven-person council that shared executive power.

The United States put direct democracy into place, while the Soviet Union
divided power between the central government and individual republics.

The United States based its political system on representation of the people,
while the Soviet Union based its system on rule by a few.