As you can figure out from a quick look at the numbers above, while there are 8 different preset modes plus user, that there are really only 5 really different ones in terms of brightness and color temp.
In other words, the first three look the same on the chart, but things like gamma, as well as other image functions have different default values, from otherwise similar modes.
Mike, our calibrator, started with Reference, which he reported to be the most accurate mode, as the basis for his "best" mode calibration. That finished calibration was placed in the User mode! Our calibration page will give all the basic settings (Brightness, Contrast, Saturation, etc.), as well as the grayscale calibration putting Red, Green, and Blue in proper balance around 6500K across the IRE range from full white to dark gray (as low as our gear will go).
Individual color calibration area of primaries and secondaries
For our member subscribers, there's an additional page with "advanced" settings, essentially the individual calibration of each of the primary and secondary colors. That's not all, there are before/after CIE charts and other graphic info as well as a few comments from Mike, our THX certified calibrator.