How did Rome's republic differ from Greek democracy? How were they similar?

The similarities of the two governments are:

1. Both people groups did not espouse any type of king. The Greeks had a famous king who was greatly loved, Codrus. When he died they realized that no one would be better. So, they did away with kings. The Romans did away with kings, because they could not stand the evil of Tarquinius. So, they both did not have kings, but for different reasons.

2. They still had magistrates that rule on behalf of the people. The Greeks had archons and the Romans had consuls.

3. Both groups had a sophisticated laws.

Here is one difference to get you started.

1. The Greeks had something called ostracism, and the Roman did not have this practice.