I recently rode several bikes for the "endurance" category, including the Domane (4.7) and the Roubaix (expert). Not a fair comparison as the Roubaix is the upper tier carbon whereas the Domane 4.7 is their lowest tier in that model. I rode them on the same 2 mile test ride loop around the LBS, which included all combinations of the flat and hills, smooth and rough pavement and the Roubaix really stood out to me...which is why I ordered one yesterday.

I worked with two different sales guys at the LBS. One of them was in the "The Domane is the Roubaix killer!" camp, while the other was in the "The Domane is flying out the door but I don't get why" camp.