Drew, firstly, thanks for posting the stills. These are very, very helpful, believe me. BTW I created an account so I could post in this thread (this is my first post on this site). Just so you know where I'm coming from: I'm a photographer, shooting mainly digital, but I prefer film.
I've had a look at the stills and I'm amazed. This is 16mm, 500T, pushed one stop, and the results look about the same as a lot of 8-perf 35mm that I see - in fact, this looks better. A lot of photographers are shooting CineStill etc. and from what I've seen, the results aren't that good in terms of graininess. I have nothing against grain - far from it - but merely on technical grounds, I'm amazed that these 16mm frames exhibit less graininess than a lot of 8-perf stills. What the hell is going on?
I've seen medium format negs with graininess not that much less than what I'm seeing in your images. I don't understand it. I suspect it's the scanning - in photography, it's the weak link and quite laborious. From what I can see, the cine film scanners are amazing. And obviously, VISION3 is amazing - but photographers can't seem to get that stuff to work. I have not tried it myself, though, partly because I am not seeing good results.
Maybe the problem is that photography scanners are literally scanners, whereas cinema scanners are, if I infer correctly, single-shot. Scanning lights probably accentuate the grain while not pulling out any more detail than single-shot scanners are.
I'd really love some answers on this issue if you or anyone else has them. And thank you once again for posting these. It has been a revelation.