Why do the rotational viscometer and the SV Series differ in measurement results of Non-Newtonian fluid? [Viscometers] [SV10/100]

The difference in results is merely due to the difference of their measurement systems, thus both results are correct in their own ways. For example, if you change shear rate, as measurement condition of rotational viscometer, by increasing the rotational speed, rpm, the measured viscosity changes. This shows that measurement results depend on measurement conditions and that those results are both valid.