Out of curiosity, have you tried a compensated comparison for gaming? For example using Sonarworks Tru-fi, Equaliser APO etc. https://github.com/jaakkopasanen/AutoEq I don’t own the Arya but have tried one and also find it a better all rounder and generally more pleasant to listen to. The HD800s, I have to use a tube amp or compensation otherwise I find it too fatiguing. Were it not for those, I would have sold them but with tube and/or compensation, gaming and movies on the HD800s are the best I have experienced, especially when compensated. Compared to the Arya (also compensated) I still found the HD800s to have the more holographic soundstage and precise imaging (not that the Arya was bad, it was still excellent in its own right).