hd600's vocals are way more crispy and watery smooth than x1 sadly. x1 does not even come close to the intimacy that hd600 brings, at least vocal--BEAR IN MIND I GIVE 2 CARE ABOUT detailed comparions thus i have NOT done any DELIBERATE comparison. I was sad when you post this and as I took them out of the box and was afraid I would find no difference. Well, there is, and it is very very obvious that x1 was not a knockoff of any headphone, and the hd600 has a sound of its own.
come to think of it, I guess that's why people call the senns mids wonder. I didn't understand that idea because I mostly listened to akgs. akgs are mids monsters.
also, since you mentioned hd600, i stood by and still stand by the obvious truth that--" YOU AIN'T SEEN HOW CLASSICAL MUSIC CAN SOUND FROM HEADPHONES TILL YOU HEARD HD600"
Thanks that was pretty detailed. I listen to a lot of trap, hip-hop, and RnB so I think I may enjoy the X1 more for the bass.