I see your point. It has the scallops like the 612 does. Lower back end is clearly 599. Overall result is
looks like a 612 with some retro touches. But what is it. Photoshop? (likely), Modified?, Portfolio coachbuilding program?
The answers to your questions lay within this thread--> http://ferrarichat.com/forum/showthread.php?t=259676 In short, yes, it's just a photoshop.