Adifference between the political systems in ancient greece and ancient rome?

Difference between the political systems in ancient Rome and ancient Greece:

Ancient Greece:

Ancient Greece was more committed to democratic ideals. Ancient Greece used to follow a common system for Greek government as Democracy, Monarchy, Oligarchy, Tyranny. The government which Ancient Greece followed was Republic, Parliamentary system and constitutional republic. Democracy was first derived from the "Greek word demos" which explains the whole citizen body.

Ancient Rome:

Ancient Rome consisted of Oligarchy, Autocracy, Theocracy and Absolute monarchy sort of government. The roman Republic is famous for classical Roam civilization which began to over throw the Roman Kingdom.