In all likelihood the Delta 200 was batch of 400 that was a production run experiment or variation that tested at a slower speed. The grain is probably the same as the 400. I would not expect Ilford to confirm this even if it was true.(posted 8480 days ago)Furthermore, I am getting a little tired of people who think that having one more film (paper, developer, etc.) will transform their photographic experience into nirvana. What are you using, a pinhole camera? Don't you have a shutter speed and aperture adjustments? There are only two stops between Delta 100 and 400. Do we need a separate film for every different exposure? We all seem to lust after what we don't already have, but we quickly become bored with it once we get it. Ed, please don't take this personally.