If Rollei Digibase really were RSX II, I would buy it in a second. The 50 film, at least, was perhaps to me the best example of a "perfect" film.
Colour balance was very neutral (whites are always white, blues and reds do not have any particular cast: it was the best film to shoot France's flag!), and saturation was there, but not garish.
It reminded me a little of Kodachrome in spirit, if not in substance. I always describe Kodachrome as the only film with saturated browns (!). RSX would be the film that could show saturated greys.