As per the website, ICC profiles have different uses, and different 'components' from any given ICC are often applied in different ways.
For example. Graphics Cards ONLY use the VCGT component - which is a just a 1D LUT, so ONLY affects the grey scale/white point.
It in no way manages the gamut/saturation (colour).
So, SpaceMatch DCM 'just' manages the VCGT, nothing else.
With SpaceMan ICC, you can generate ICC profiles from any given 3D LUT, and that ICC can be used by systems/graphics programs that are ICC compliant.
The way different systems/programs use ICC is down to those systems/programs.
And Windows for example has no system-wide ICC capability.
(ICCs used within a Windows environment ONLY operate with ICC compliant programs.)
Mac is 'supposed' to have a system-wide ICC capability, but often users report strange/inaccurate behaviour.
All the above is why we really do not suggest the use of ICCs for 'Display Calibration', unless you really know and understand their operation inside-out.
I hope that helps.
Mob Boss at Light Illusion