You could try contacting Ian Porter ( email@example.com ) to see if he has any sales records. As far as I know the only difference between the World and the World S is the “lay-up”, with the World S using foam core construction for extra stiffness.
A Wayfarer class measurer may be able to answer your question about floorboard heights. Is there a particular reason for the question? (e.g. space under thwart).