If I may, I'll reveal my true intentions for this thread and the vario xl iso question:
Sometime last year, I formulated a question: what would happen if I cross processed a chromogenic bw film in e6? so sometime last summer I got myself an xp2 super, shot it at iso 100, had it pushed two stops, and here was the result:
Then, sometime late December/ early January, I tried it again with a 2011 expired Kodak BW400CN. The results were in fact quite different, ISO 80, pushed two stops:
So a little time passed, and I knew Kodak had previously made a different emulsion, and I knew I had some rolls, but was confused because they had different labels. Therefore, I made this thread to find out what the difference was (and if there was any difference with portra 400 bw). But there was an unintended consequence- this thread brought my attention to the existence of agfa vario pan and konica monochrome 400 (I'd previously heard of fuji neopan bw400cn).
I recently crossed a Kodak BW+ (aka Kodak BWTCN 400), but don't have scans yet. If you're willing to wait until Thursday, I can get some digital shots of the slides. it's definitely my favorite cross process so far.
Anyway... I just got my hands on some AGFA Variopan xl from a domestic seller, saw the variable ISO, and wanted to be confident of what the original iso was before I shot them- especially since this film is not readily available to buy. My intention is to first shoot one and process it in c41, then do an e6 cross process.
I'd like to do the same with the fuji and Konica BWCNs, but those are only available from international sellers, so I'm going to wait until I move to order some.