I had been looking at the endurance category as well and reviews are saying the carbon Trek does have a noticeably large amount of rear compliance. The frame is not marketing BS, it supposedly works really well.
Someone on a forum wrote a review of riding 16 miles on torn up grated road that was waiting to be repaved on his carbon Domane. You can also see video of how must the seatpost flexes. I sort of doubt the other bikes are as comfortable since they can't possibly flex as much. I could easily be wrong but I am sold on the Domane's marketing hype. Since the frame is the most expensive part on a bike, I would invest in the frame most. That said I hear good things about titanium frames but they seem to not lay power down as well as the stiffer carbon frames, but no one has actually done a comparison between a Domane and a ti bike that I can find.
Last edited by ttakata73; 07-06-13 at 06:57 AM.