Convergence 2011: GP vs NAV

We are upgrading to NAV 2009 R2 in the near future and I am thinking of attending Convergence 2011.  Some of the time slots doing have any classes specifically dealing with NAV that I want to attend but there are some GP classes that interest me. How similar is GP 2010 to NAV 2009? Can I attend a few of the GP sessions and walk away with knowledge that I can then use with NAV? Or are the two systems so different that it would be a waste of time?