I agree that it isn't precisely the same as the Z4 coupe, though the rear fender line is damn similar.
While you are correct that Audi and BMW have been making 4 door shooting brake GT's rather than 2 door ones, the fact remains that this type of fastback concept has been done before. Also, don't forget the Saab 9X concept from years back which was also a 2 door shooting brake. I'm just saying this car doesn't break new ground, except that it is quite a departure for Ferrari. I applaud their guts for doing such an unusual car.
I am curious what yu think of the front, and what your other studio mates have thought about the wide toothy grill. For me, it's just way too large and reminds me of a Peugeot with braces.

: its silhouette is nothing like a z4 coupe the z4 is a pure coupe..
: one line front the top of the a pillar back to the rear deck....
: the ferrari has a broken line that makes the silhouette more
: interesting... regards to other manufacturers already doing
: this.. bmw and audi do not produce a two door shooting break,
: five door supposed coupes yes 5 series gts... but that is
: exactly what this ferrari is not.... its a two door shooting
: break.. estate car however you want to label it.. the closest
: there is, and most recent is the bentley superlegera flying
: star... and going back yes the bmw z3.... its all these small
: things that bring about new segments in vehicle design...
: overall id say it was a great attempt to move the 612 scaglietti
: into a new genre...

: theres been lots of discussion on this in the studio recentley....
: it will influence bmw and audi and porsche... wouldnt be
: surprised to see the panamera chopped into a two door with the
: profile something similar to this...