Sooo... A friend of mine just spotted that Yncarne's save (Ynnead Stirs) specifically says that it applies to Wounds and Mortal Wounds...
Of course it implies that they are not one and the same and therefore our PFP save does not help against Mortal Wounds.
It also implies that if Wounds and Mortal Wounds are not the same, any unit that heals Wounds, cannot heal Mortal Wounds. For example Yncarne - Avatar of Ynnead ability.
Any thoughts (beyond GW sloppy terminology)?