I sense some confusion between spring length and spring rate.
Volkswagen specifies the spring rate (in N/mm, or lbs/in for those inclined to use imperial measures) to match the axle masses of the car, depending on the equipment and the resultant mass (or weight, as we like to call it). This allows all the variations in the car to behave identically, regardless of equipment (and thus, weight).
The length of the spring is not related to the spring rate. Hypothetically, a European Golf R with full equipment and a curb weight almost identical to a North American Golf R will have the very same spring rate as the NA vehicle. Howver, the length of the spring is different, and the North American Golf will have a slightly increased ride height.
Assuming identical spring rates and that the small variation in ride height didn't change the geometry (i.e. roll centre) significantly, the driver will not be able to discern the difference between the European and the North American Golf R.