@User: So the difference between distances for P and N devices to poly contact comes from one obscure rule

psdm.5a

such that for N diffusion the rule is simply

licon.14

(poly licon to diff or tap) but for P diffusion the rule is gated by

licon.9

+

psdm.5a

(poly licon to psdm, and enclosure of diff by psdm).