Also quite important is that the renderer in Poser Pro is truly multi-threaded, so if you have two or four cores, you will see a significant improvement over Poser 7. Combine that with the potential for 64-bit support and there is a large performance advantage in favor of Poser Pro.

And then, of course, there's the fact that Poser Pro has a Gamma Correction function. Bagginsbill showed why that's such an important feature in this thread. It really makes a huge difference in realism.