Would not surprise me. Duragloss and Zaino comes to mind. P21S and
S100 is another. Some MF towels also look/feel/behave alike. I asked this similar type question months ago on AG or Autopia between Menzerna and Scholl's. I was told that they are both German and perform alike.
Not saying that Menz and Rupes are the same or have same ancestry (do not know) but history says do not be shocked.