Over the past year or so I've read so many different things about Rollei Retro products, so many claims that one film is "really" another film, that Maco data sheets can't be trusted, that the quoted speeds are way off and so on and so forth.

The trouble is that no-one who ever claims that one film is "really" another film ever seems to back it up with any evidence that is more (or less) credible than Rollei's (or Maco's) statrments & claims.

In the end therefore it all just seems a lot more "internet bollocks", unless someone has some evidential support beyond their own beliefs for all these wildly conflicting claims.

In the absence of anything sold to go on, the best thing to do is shoot it and work out how best to develop at what EI yourself.