Pro is a different carbon so it has a different underlying color (what painters call a "base tone").
Because of these underlying differences it will not have the same spectral response as K7 ink nor did I build it to have that, however it will get close.
Rules of thumb:
100% warm will not replicate K7 carbon but will get close. It's less rosy and I made this ink to replicate a 100% Palladium Warm Oxalate print on Type 2 paper.
50% Warm 50% Cool will get you a decent Warm-Neutral on Type 2. Slide between the warms and cool or warm and neutral curves to your desire. The warm neutrals in Pro are very close to the old PiezoTone WN.
23%Warm 77% Cool will give you a neutral (more neutral than our K7 neutral which is built to replicate old F-type "Euro-neutral")
Full warm shadows into cool highlights will give you a Special Edition. Adjust to your desire as this split is dependent on the image tones.
50% neutral and 50% cool in Mid/Shadows and then 50% Neutral and 25% Warm in highlights will give you a decent selenium. On some images (darker images) the selenium quality becomes even more evident. This ink will not give you magenta mid-highlights like K7 selenium ink but in my opinion is just a "different' type of selenium.