visually I don't think you'll see a difference. It's more of mapping issue for surface points. The only place I could see it reflected was in the attributes for loftedsurfaceshape# under NURBS Surface history. It will either show a min/max of 0 and 1 or 0 and # of spans. Your should be safe using either unless you plan to take the surface into a modeling program that prefers on over the other.