Thanks guys, you are all awesome.
So in summary (for me
Besides the standard 100% calibration technique you can calibrate at:
75% saturation, 100% luminance
100% saturation, 75% luminance
and of course any lesser values/combinations if beneficial and available.
So in a perfect world calibrating at any of these "other" settings would always give results that would match.
However since nothing is perfect if you are going to compromise, compromise the lesser used conditions like 100% luminance and 100% saturation and keep the 75%, most used settings, most accurate.
I'm going to first verify my best settings at 75% saturation then at 75% luminance and see how good(linear) the decoding is.