If you’re able to make it out, you will notice that the grille and mirrors of the 2014 Cadillac CTS test mule in the front of the photo are not exactly identical to the one in the back. Now we’re not going to jump around and irrationally conclude that one is the all-but-official V model, but it’s healthy to point out this interesting observation.
The front model features mirrors that are taller and more present than the sleek mirrors of the CTS following it up the road. Also of note, the rear lamps of the two models are patterned differently, which can be seen in a photo found on Autoblog. The grille on the front model also features more cladding than the rear, but that’s probably there just for the hell of it.
Perhaps the front CTS is the European-spec model, while the one in tow is the one bound for North America? Considering the changes are indeed so slight, it’s very plausible, as the Euro-spec Chevy Camaro features the same sort of changes compared to the American one.