Sorry for the delay in replying.
We will soon release SolidWorks plug-in V2 and Rhino plug-in V1 (For both plug-ins, the surface quality generated is the same and both are powered by the same kernel, so SolidWorks plug-in V2 == Rhino plug-in V1.)
You may be interested to read the discussion from SolidWorks Forum (https://forum.solidworks.com/thread/216269 ). In fact, our customers comment that ‘xNURBS V1 generates much better results compared with SolidWorks own tools, e.g., Boundary surface etc.’. The same will be true for the Rhino plug-in. V2 includes significant improvements.In the future, we will optimize for quad-sided surfaces. In plain English, we will develop variational tools to replace the corresponding traditional surfacing tools, e.g., variational lofting (Of course, they produce superior results compared with the traditional tools.)