Bondware does advertise a new interface. From the Poser 13 page:

"Poser 13 comes packed with a host of new features and improvements that make it easier than ever to create stunning 3D artwork. It boasts a completely redesigned user interface that provides a more intuitive and streamlined workflow, allowing users to focus on their creative process rather than getting bogged down in technical details."

I'm not sure what they are talking about. Looks the same to me.