Stephanie von Hohenzollern - Die Schwester and Eine Art Mord

The child credited as Stephanie in Die Schwester (1981) is the stepdaughter of Fritz Wepper (and naturally half-sister of actress Sophie Wepper). As far I know her full name is Stefanie Michaela Sigrid Birgitta von Hohenzollern (* 8. Mai 1971) (http://de.wikipedia.org/wiki/Ferfried_Prinz_von_Hohenzollern).

In Eine Art Mord (1988) there is a Stephanie von Hohenzollern credited. Are these two the same person? I suppose she could be the blonde daughter of Karl Rutger (Manfred Zapatka).

So this pages could be merged
http://www.imdb.com/name/nm3164555/
http://www.imdb.com/name/nm3101727/

May anyone confirm this?

P.S.
It seems Stephanie von Hohenzollern is of noble birth and I found a few news about her but I was not able to find a photo (that surely could answer the question). Probably someone with a good knowledge of German language may find one.