My 5 cents: The viewport is more "modern", faster than XSI's, and supports DX11 shaders. The SDK is really open, there is hardly anything you don't have access to. Texture swimming works. The general notion of complex rig performance is that it's better than in XSI's. Fluids and Muscles out of the box, abeit not user friendly and of limited usability/stability. More robust NURBS import and surface modeling (e.g. curves on surface, etc). Better support from game-related 3rd parties (exporters to various game engines). MentalRay is a plugin (that has both pros and cons)
-- ----------------------------------------------------- Stefan Kubicek ste...@keyvis.at -----------------------------------------------------
