Ok, they are better than HD595. Period.
Two points: they are more comfortable by far than the HD595, clamp force and that stuff. And the HD595 chassis vibration issue. When you play loud, and not very loud, some sound frequencies produce a vibration over cups that pads transmit to your skull skin. That can be distracting and annoying. The ATs haven't this issue at all. They are solid (rigid) as a rock (but not heavy).
I'm not a very experienced person in sound signature diversity. So, maybe, it's a mistake that I talk about tonal timbre. I don't experienced Beyers either (and, until yesterday, AT brand too). I played several Tan Dun's works. And the cello performed by Yo Yo Ma sounds good to me.
After few hours (about five) when U2 "Rattle and Hum" was played and enjoyed I notice the VERY warm sounds that these cans deliver. I was surprised. The bass is there with a "thoomb" and decay (Akira BSO, AC/DC Big Gun). With HD595 the bass is a "tok" and suddenly disappears. With my ears the treble ever hurts me. Even HD595, sometimes, not very often, do that behavior. But treble in AT are "more controlled" to my brain. If this "feature" means treble roll-off because I am very sensible, I don't know. Over midrange, well, choral chants are very similar, only Senns lack quality on upper midrange (maybe some kind of distortion) when the music are complex and they are busy. The ATs don't show that handicap at the moment. Intimacy, delicacy and transparency are three qualities of their sound sig. They are transparent and sweet at the same time, very sweet. I expected a problem with detail if they were very sweet but, my biggest surprise, they deliver both. Detail isn't analyticity, with these cans at least. There are sound qualities that Senns haven't, like involving. I haven't knowledge to explain if that matter is reached by mitigated several frequencies over other ones. But musical information is presented in full soundscape (regarding tonal timbre) as it is showed while playing Rimsky-Korsakov's complex orchestrations (Scheherezade). It's a pity that soundstage is the same, compared to HD595, very, very tiny. So big orchestras don't show layers of instruments positions or space among them.
Of course they have only few hours. I believe in "burn-in" but I prefer enjoy during process.
I hope these paraghraps help you.