I like to think of the pegasi as not just Ancient Greeks but also Byzantines as well. And to a larger extent Eastern European Orthodox civilization as well.
Cloudsdale is ruled by a Tsar. Who only rules Cloudsdale and a few other domains. Cloudsdale is like Muscovy. And Las Pegasus is like Novogorod (it has sadly degenerated into a den of gamblers though instead of a city known for a literate educated democracy)
Also Cloudsdale has always been the second most powerful city in Equestria after Canterlot. And in the future they might become more influencial than the Unicorn dominant city.