Why are there both PC and Mac licenses?

[Penthea]

Shadowlands and Endwalker are both $40 at launch.

My mistake or perhaps regional pricing differs depending on your location. I know that before I paid more for WoW expansions than FF expansions. But it's been many years since I bought a WoW expansion.

Whatever the case SE should at least offer a discount to those who buy additional versions of the client for the game when bought for the same account.