I'm sure we are all aware that there is a difference in Geometry in the two bikes (Longer head tube, shorter top tube over the racing bike) and that the sportive is aimed at a more comfortable ride over longer distances. but does this mean that pro riders use a more sportive frame over the road bike? and if not why? bearing in mind that they do more miles in the saddle than the average joe doing a sportive? or do they have a sportive style frame when heading into the mountain stages?