Miele changed details on models rather often. And then there are the differences between countries. Somehow the Netherlands often got the models with the higher spinspeeds, sometimes higher than the German models. I guess we are a high speed country. ;-)
Actually I can't remember seeing here a W754S, only a W754. I found some brochures. The February 1983 one doesn't show a W754. The lower end models were the W751 (900rpm), the W753(1050rpm) and the W756(1250rpm).
In the August 1987 there are only a W750 (1150rpm) and a W756 (1250rpm) for the BOL range.
And in the December 1987 household catalogue there is a W754 (1150rpm). Also a W755 (1250rpm).