It's a bunch of OpenGL calls - to the same OGL functions as C would call - so there will be no difference, unless Max has some weird and wonderful way of implementing calls - which I severly doubt. Get the demo and check out the OpenGL 3D head for yourself.
Bottom line is Max is the future, B3D is the past. B3D is still a very usable product, but don't expect major updates.
Bottom line is Max is the future, B3D is the past. B3D is still a very usable product, but don't expect major updates.