Why do you care?

I am asking this because the only reason to try to match colour head settings to contrast "grades" is that it gives you a rough guide to how one might obtain similar prints from different enlargers of the same or similar negatives.

If your intention is to use the same enlarger for all your work, then the printed guides will give some guidance on how much change in contrast will result from certain changes in settings, but otherwise it is the photographer's judgement, perception and preferences that will determine that photographer's chosen settings.

And as for the so-called "speed-matching" filter settings, they too are rough guides, and only really close if the tone used by the manufacturer to develop them is the same tone as the one the photographer wishes to match.