Jeff,
If you don't mind me asking, what source did you use for the second Ditzler color? My 1967 Ditzler Interior swatch chart has the #32586 Charcoal Black Poly. but makes no mention of the #32651.
The reason I'm asking is that I've run into a similar situation for the 1966 interior color on red cars where the all red interior Ditzler #71541 obviously has a darker dash pad area color - but no mention is made of the shade.