Here is a repeat of my previous "gray towel" exercise, but with a better scale and a MacBeth Color Checker in the shot to help evaluate color. I guess you could say that these film simulations perhaps are supposed to behave like film. If that is a reasonable assumption, then maybe one could visualize the tonal range in terms of the "Zone System" made popular by Adams. Think of my "0" value as "Zone V" with my "-4" equivalent to "Zone I" and my "+4" equivalent to "Zone IX." Seems to make sense, visually, given the qualitative descriptions of what each zone should represent in terms of tone and detail.
Interesting. Now I have to start treating my digital camera like a film camera ... LOL.
GFX 50s, at ISO 100, daylight WB fixed, middle gray metered with Pentax Digital Spot meter. Shot in indirect diffuse shade lighting, coming through a large window.