Aha! Two years on ... sigh.
And still no answer to such a fascinating question
Are they different? How is each adjustment calculated?
It would be great, if the manual would describe the adjustments in terms of color theory, for example in color mixing terminology (http://en.wikipedia.org/wiki/Tints_and_shades). As it is, we are forced to reverse engineer the controls, to explore what can be done with them.