I actually tuned both these headphones primarily on an Audio GD master 11 so it should be pretty good. I also test on a Decware Taboo and CSP and Cavalli Liquid Gold and Dragonfly (black) as well as testing out of my LG V10. Between solid state and/or OTL it really comes down to taste, I've heard numerous different OTL's alone sound very different from the Atticus.
Wow...a Dragonfly? How did that sound?