The VOIDRUNNER'S CODEX is LIVE! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
I have voted for the more Greyhawk like world (Mystara as the Known World) as I perceive it - I could be wrong as neither of these worlds is really my cup of tea. Both are a bit like Greyhawk but not as good.