I disagree with everyone in this thread wanting to burden a regular user with options and highlights about a technical detail like rational surfaces. Bobi is right here, and Rhino should handle this for the user (it’s computer aided design, so how about a little more aid here) and I’ve encountered no other CAD software which exposes this difference to the user and places the burden on them to handle it.
It’s a bit sad how poorly Rhino handles rational surfaces still after how many decades now?