I think it's simple for me, the reason I will consider beyerdynamic t5p over xc
1. the comfort issue
2. wider sound stage
3. ability to change ear pads without using the glued solution (2 sided adhesive tapes ? really for nearly $2k product ?)
4. cheaper, (at one point amazon was selling just under $1k).
5. angled pads design instead of angled drivers.
But only thing that I don't like about T5P is the cable, other than that I am fine.
If I can only wear Audeze for about 10 minutes then it's not worth it for me. My LCD2.2 was just left in the storage box after I got HD800.
But this is just my opinion, no fanboyism of any.