Thanks for your help with ideas on how to screencap! What ended up working was installing AnyDVD and then VLC would easily read it then and I could use Print Screen and then throw it into Photoshop from there!
So I'm going to post a couple of examples from Episode 14 of Unit-00 going berserk. What I am talking about is the fact that around the bluest parts of Unit-00 the grain is much chunkier, but it's not uniform it's much more clumpier than usual film grain is. And then in the same frame there is nice uniform grain for example on the white parts of Unit-00's arm and uniform grain on the background. I would say that this is just how the film was developed but in the next few cuts back to Misato, Ritsuko, et al there is barely any grain at all.
Now take a look at this screencap. The bright blue of Unit-00's palm is a nice near-solid blue, but around the edges to the adjacent coloring the clumpy grain starts to show up. This to me is the telltale signs of DNR because usually the DNR algorithms can have a tough time telling the difference between what is grain and what is image around detailed parts of the image.
Here's another shot. Just look at the difference in grain between the blue and the sort of green/beige 'face' of Unit-00.
Now I have one more comparison to show. I screencapped the same scene from Episode 5 that appears in Death (This is the first release of Death found on Disc 6 of the set, not Death(true)2
on Disc 8). Now I know a little more grain is going to be introduced when you take a 16mm production meant for a 4:3 aspect ratio and you crop into 16:9 (or whatever widescreen ratio Death and Rebirth was released in) but this is the kind of grain I would normally expect from a 16mm anime production from the mid-90s. In fact the grain found in Death during the clips that were originally produced for the TV series even has a similar grain profile to other anime of the time, like Sailor Moon or DBZ.
Now look at the same frame from Episode 5 on the Blu-ray Disc 1...
Ignoring the overall color balance you can see that there is grain, sort of, but it is much 'cleaner' and the grain is a uniform color. In color film negatives the grain is made up of millions of tiny dye crystals that have subtle variations in coloring as you can easily see in the screenshot from Death but is scrubbed and washed in the Episode 5 and replaced with a suspiciously uniform and 'colorless' grain. Not to mention there is some more detail in the towel Rei is lying on in the Death screenshot that is slightly blurred away with the grain in the Episode 5 shot.
I can post some more examples but I am pretty positive now that they used a DNR process and then added a much smaller digital 'grain'. I still think the whole set technically looks great and that the DNR looks pretty good and subtle in most instances, but since I'm a bit of a pure-ist I wish they could have left the grain completely intact.