Not that I'm doubting you, but what's your source for this info? FWIW, I always thought Pfanstiehl was just a reseller as well, especially as they sell/sold OEM styli in Pfanstiehl packaging.
All of the EVGs I've seen appear to be from Japan and most Pfastiehls are Swiss.
Pfanstiehl both sold OEM styli in their own packaging (three digit part numbers), or their own Swiss-made styli (4xxx part numbers). I don't think they do any OEM resales these days. I've seen EVGs that say something like "Made in Switzerland" on eBay, and the only styli manufacturer that I've ever heard of there is Pfanstiehl. The only sources I have for the info are personal observation and a few comments that I've seen here.
AFAIK, there are three or four stylus manufacturers still operating in Japan, with JICO being the best known on the general market (I'm not counting cartridge manufacturers like Audio-Technica). I've seen pictures of some EVGs that didn't have the distinctive look of JICO but were labeled as "Made in Japan," so Russell has to be getting some of their supply from somewhere else. That said, I'm pretty sure all of their Japan-sourced Shure styli are JICOs. I have seen a couple of EVG Shure styli that were clearly repackaged Pfanstiehl.