I think the most striking similarity is the bicameral nature of the Roman's government. Like the Senate and House of Representatives today, the Romans had their Senate and populi. In his writing, you can tell there was a set of checks and balances in place with this one line: "And, whenever either of the separate parts of the republic attempts to exceed its proper limits, excites contention and dispute, and struggles to obtain a greater share of power than that which is assigned to it by the laws, it is manifest that, since no one single part, as we have shown in this discourse, is in itself supreme or absolute, the part which thus aspires must soon be reduced again within its own just bounds..."
A big difference I can see in his writing
A big difference I can see in his writing