Get a bike fit first, figure out what geometry you want, then pick frames. The Foil and SuperSix are geometrically more like Trek's Madone H1 or H2 geometry, while the Domane is more like Scott's CR1 or Cannondale's Synapse.

THe big difference is head tube length - higher head tube = higher riding position = usually marketed towards distance/comfort as opposed to shorter head tube marketed towards racing.

But, it all depends on your body dimensions - for example, I ride a CR1 ('comfort') bike to race, b/c I have a short torso and poor flexibility.