Hard to tell, but that beefier rear dropout could be to accommodate a direct mount derailleur. I suppose the release will be finalised once R9150 di2 lands (mid Feb, allegedly). There go my hopes of buying a cheap 2014 R5 while consoling myself with the fact that I still have the latest and greatest frameset.
This also doesn't seem to be the standard colour scheme, as implied by the post.
EDIT: again, can't be sure from that picture, but is that a direct mounted front brake?