Well initially, the ionians were better off because they were 'free' from persian dominance. However, there was a decree signed between persia and athens sometime after the persian wars that was a peace treaty between Persia and Athens. Although this decree did little to stop further conflict between Athens and Persia, one of the conditions of it was that the Ionian Greeks were free from both Athenian and Persian ties. Meaning that Persia was meant to leave them alone, while the Athenians were also supposed to sever their ties with them. This was beleived to have been initiated by the Persians, who were afraid that the area occupied by the Ionian Greeks was far too valuable for the Athenians to have control over, should they choose to attack Asia Minor. Mind you, the increasing imperialistic actions being taken out by athens may have driven the Ionan Greeks away from their ties with the powerful city-state that was fast becoming an empire. Read up on this through bury and Meiggs because from memory they had a fair bit to say on the subject. If you cant find their books, ask your teacher who will most likely have access or know where to get help.
Hope that helped you!