The FF HSV was incorrectly set up and had been for a long time.  The Poser techs decided to create the HSV2 which made better sense because the Hue would be normalized at zero value and change as you scaled up the increments.  Both do the same thing but the Poser manual recommends deferring to the newer node, HSV2.  That's my preferred node if I want to tint the color chip.