The basic pricing formula seems to give out a punnet square:
Similar, on body x1?
Similar, not on body x.75, x.5,
Different, on body x1 x1.5
Different, not on body x1
The first one is what I'm confused about, as there are several Canon items like cloak of hedgemage, Featherscale cloak, eagle cape, etc, that are almost definitely using the "similar, on body" x1. It's also just implied to be a x1 by the lack of specific example, though by similar token, different, not in body is only addressed briefly as an aside and as a counterexample rather than being specifically addressed.
Is there sufficient evidence for it existing?