Uhmmm, I've also played both Aion and Rohan, and there's no comparision possible imo, both look asian, Rohan more than Aion, but the forests in rohan are floors painted in green, in Aion the forests are breathtaking, saw all those little creatures running around, the spores going out of everywhere, the lighting variations, the neverending trees which won't let you see the sun, ect...

Plus Rohan's customization is laughable, and the character models didn't seem right for me, at least not the elven race.

Aniways, I tried Aion in GC and im deffinetly preordering.