I didn't ride the S-works Roubaix, only the Expert in the current model. Then I test rode the Focus Izalco Ergoride, and to me the Focus felt stiffer and better for power transfer when out of the saddle (I'm not a lightweight) yet still very compliant on bad pavement. So that's what I ended up purchasing. I still like the current Roubaix better in the looks department, but I'm happy with the build quality and price of the Focus. YMMV