I sub palm for lard, they behave almost the same in bar soap, but pko is similar to coconut, harder, lots of fluffy lather, but much less moisturizing (or non-drying) than palm.
A good recipe (to me) is 50% olive (or your choice of liquid oil); 21% palm or lard, 26% coconut or pko, (some soapers say this is too high but I like it), 3% castor (castor really moisturizes, and also helps hold your scents cuz it's so viscous, but too much castor (more than 5%) tends to make soap sticky). JMHO.