If the Greek city-states had lost, they would have been put under control of a Persian governor and unable to pursue their ongoing fighting of each other.
They were two different wars - the Persian War wass the persian Empire versus the mainland Greek cities, and the Peloponnesian War was between Greek cities. The Greeks won some, lost some in both wars.
Persia
Ticonderoga Battle was an important Battle for Persian as they were fighting against Greece peoples. In 1755 when Greece Parliament took the rights of Persian peoples then Persians made a unity which was named as `Persion war-e-stimas'. In 1758 it took places in Africa's region. Persians were true fighters. In that battle of Ticonderoga Persian won against of Greece.
A confederation of Greek city-states.
The Greek city-states in Asia Minor revolted against Persian rule, and spread to mainland Greece. The Greeks won.
Rome, definitely.
The Persian Wars pitted the Persians against the mainland Greeks. Eventually, the Greeks won after defeating the Persians by land and sea in the Second Persian War. Later, the Macedonian Geeks, under Alexander the Great, invaded and conquered the Persian Empire.
The combined armies of the Greek city-states.
The Persian Empire and an alliance of Greek city-states led first by Sparta and then Athens.
The Greek city-states which did not side with Persia.
The ancient Greece civilization had many characteristics but the most important one is bravery. It fought so many wars and also won so many. This is a true trait. :)
It would not have changed one iota.