What are some social similarities between classical greece and rome

Some of the social similarities between classical Greece and Rome are as follows:

1. Within both Greece and Rome there was social classes. This class system was created by wealth differentiation amongst the citizens. The social classes within Greece were; slaves, freedmen, metics, citizens and women. While in Rome there were; slaves, freedmen, plebeians and patricians.

2. Both Greece and Rome practiced polytheistic religion. This means that they believed in more than one gods.  

whose power in the senate is equal to the power of the speaker of the house?