I just had the idea to look at what the 2015 Roubaix's show on the Specialized site and it seems to have answered my questions for me:
FRONT DERAILLEUR: Shimano Ultegra, 11-speed, braze-on
REAR DERAILLEUR: Shimano Ultegra, 11-speed, long cage
CASSETTE: Shimano Ultegra, 11-speed, 11-32
Sometimes you just need to know where to look, I guess.