I was wondering how the images in your post were scanned. Did you adjust the levels (brightness) on the right-side image? What was the scan rate (PPI)?
The left-side image looks typical for well-exposed S-800, The grainy, flat right-side image resembles results I get when I under expose an image. But this image does not appear to be under exposed, and the grain is not just shadow grain.
The poor image appears to be cropped. I'm guessing this is a top-center crop? What was the light like in the rest of the frame?
In my experience, S-800 can give results like you this in flat, low contrast light, In these conditions over-exposure can lead to grain.
I have messed up more NPZ-800 and S-800 exposures than I care to admit. Most of these were with a Canonet G-III QL17 which meters with technology similar to your Konica. Practically all my mistakes were due to under exposure. But I think your photo may be over exposed. I think this type of light meter is best used as a guide rather than as a true auto-exposure system. I'm assuming your SLR has a more sophisticated metering system than the Konica. If so, I found I could not use the Konica-style meter like I use my SLR's or my Zeiss Ikon M's meter.
Fred Parker's Ultimate Exposure Computer (
http://www.fredparker.com/ultexp1.htm really opened my eyes. It actually works.
My advice for indoor low-light conditions would be to use your brain (see above) as an exposure meter rather than the Konica meter. I would take a few close-up readings with the Konica and decide what EV range was appropriate. In this case, I'm guessing your had EV 5-7. I'd expose manually using the shutter aperture combination for the EV dictated by the light level. I successfully shot an indoor charity party in a poorly lit venue without auto exposure. I used a Nikon F3 SLR (Fuji S-1600) and the Canonet (Ilford Delta 3200). I used this method with NPZ-800 during a visit to a home I'd never been in before and avoided flat grainy exposures there as well.
I have had great experiences with Ilford 32000 and I have had horrible experiences. I quit using this film. I will either push TriX or try Neopan 1600 the next time I need that kind of speed. I'm not sure your SLR experience and the Konica results are related at all.
I have a ton of S-800 in the 'fridge. When it's gone, I plan to try the new Kodak 800 film before I buy the next batch of ISO 800 color film.
willie
