So for a little while now I have been wondering if digital had an optimal color temperature range like film, but never thought of a way to test for it. Then, Chris wrote something about thinking about using an 80A in a earlier topic. So this morning, I got bored and decided to set up a pretty crappy still life of my small Christmas shrub on a wood table with some beer and wine bottles, cookies, plates, a blue Calculus book, etc. I lit the table with two Tota lights, one reflecting out of a 50 inch umbrella and the other straight on. Using a P45+ with C1 Pro v6, I captured an image with and without an 80A, using the exposure calibrator in C1 to get the exposures as close as possible.
When noise is concerned, the differences are mute in the mid-tones and highlights. In the shadows, color noise was worse on the non-80A image, especially when pushed hard, although not by much. I did not have anything very dark and blue with varying tonalities, so I had to look into the shadows of the green tree to test for this. Maybe with something darker and bluer, the noise would be much more less with the 80A.
On the topic of color, it seems the 80A may be more useful. I used the same spot on a white wall behind the scene to color correct. The 80A image looked cleaner and more true, even though the same exact spot was used for color correction. This was especially the case for objects with more red in them.
In conclusion, if you are concerned about noise, using an 80A would only be beneficial for darker images. However, if you need to reduce the color saturation/strength of only the red channel, using an 80A would help a good deal, it appears.
See below, non-80A on the left, 80A on the right.