Answer:
Both have bureaucracy, monarchy and aristocratic rule.
Step-by-step explanation:
The similarities between the Greek and Roman government systems is that both Greek and Roman government was ruled by a small class which have all the power. Both Greek and Roman empires were made of many city-states and both Greek and Roman empires have bureaucracy who runs the empire. Both ancient Greek and Roman empire have the government of monarchy i. e. ruled by the king.