The sources are a bit confusing about the different versions of the NSU Typ 32. Most agree there were three cars, one each bodied by Reutter, Drauz and Weinsberg, others speak of two Drauz-bodied cars and the Reutter one. The surviving car at the VW museum is either credited to Weinsberg or Drauz.
When you look closely you can spot differences between the car in the picture set and the car in the single picture above: the semaphores behind the side windows or the lack of it. But that doesn't mean that these have to be two different cars, as probably the prototypes were modified frequently.