I must be honest, I don't know much about these guys. Considering the lack of references, I might lean towards some liberty with them to add to the different looks of each faction.
There are some nice variations between greeks themselves, the kind of helmets adopted by the lacedaemonians and athenians, the thessalian and macedonian cavalry units and so on. I will keep as much greek factions as possible without making them repetitive. I want players to look at a guy and know which faction he is, and even tell what's his family from his shield device. If greeks are kept that way, along with the unique thracians, scythians, illyrians, epirotes and future persians, then there'll a nice, individual flavour for each faction, that's one of my goals for the alpha. Another goal is to keep everyone in there while still focusing on the historical conflict between the two big players.