True... It made me think it could be the same emulsion as the old Astia 100 (without F), as it was coded RAP and the 100F version is RAPF. Sensia 100 used to be coded RD (Provia is/was RDP) back in mid 90's and I also have a finnish photo magazine from -96 with a slide film test, saying Provia 100 has exactly same granularity and colors as Sensia 100. So it would make perfect sense that the current Sensia is same base as the old Astia, given that the RMS for Astia 100 is also 10.