Exactly. Clearly as these images illustrate there are many small differences in the models but they are ultimately still two very similar looking Nissan GT-R GT3s. In fact, if they have modelled the new one from scratch it's even more frustrating, because that means it has taken just as long as modelling any completely new vehicle instead.
I really can't see there being that many people who are massively excited about having a slightly updated GT-R, which is still old, compared to how many people would have been excited to see a totally new car. But, PD have their sponsors to think of, clearly.
..and even more frustrating, you can't even see most of the detail they've spent so long on since it's not all visible in cockpit view and they still don't let us photograph interiors. So except for some promo shots like the OP, we'll never see the detailed welds and cables the modeller spent so much time on. The mind constantly boggles with PD.