Asaka Takishima and Takishima Asaka are considered different authors, while it's just different name order.
Okuu = Utsuho, but in pairings they are different.
Touhou moon is different. It has air, it has oceans with water, it has trees and stuff.
Even humans can live there just fine - although they are not allowed to. You can see that in Silent Sinner in Blue, for example.