Rode the Synapse Carbon 6 Apex today for comparision to the Specialized Roubaix Elite. For me, the Roubaix is the better ride. There's nothing wrong with the Synapse, but over most of today's ride it was not significantly better than my Trek 1500. Funny thing is, I was thinking along similar lines for 80% of the Roubaix ride, but when I got off the Roubaix I felt as if I could ride another couple of hours. My butt was sore from riding on a too narrow saddle, but the lower back felt good and strong (this is one area where the Trek falls short). I thought the two would be much closer, since they are both carbon. LOL. Lends some credence to the claim that it's not all about the frame material. I was hoping the Synapse would perform equally, mainly because it's $200 cheaper than the Roubaix! The 2010 Synapse Carbon with Ultegre was Bicycling magazine's "plushest ride" winner. Hmmmmm. The Synapse has a shorter wheelbase - identical to my Trek - which I suppose could have some effect on differences in ride quality. The Synapse felt quick, but so did the Roubaix, and I think that's what surprised me about the Roubaix - comfy and quick.