Hey Shadow-11
No. There is no difference.
Both towns need to contribute faith to the same wonder.
You do not get two independent activations.
Players typically prefer to colonize their towns close to one another, starting with the islands of Hephaestus, Poseidon and Colossus.
If your goal is to use Poseidon as often as possible (for moving fleets, timing wars, or chaining operations), it is better to have two/three towns on the same island (avoid waiting time and loading times) if that island is strategically important or you want to strengthen your control of that wonder.
Furthermore, having more than one town in Poseidon will help you only reduce the cooldown.
Don't forget you still need to have a temple in Poseidon's towns to apply the reduction.
hello
Is there any difference between 2 miracle in one island with 2 same miracle on difference island in assumption of have enough faith?
I want to get 2 poseidon miracle but dont know that is any difference between them or not