Back around 2008, it seems there was some discussion of these options. I've been using level (RR) based poisons most of my gaming life, but have started using more CO-based, and now luck-based poisons.
Based on Creatures & Treasures' (p. 60/section 2.51) exposition on them, characters get to add their racial and CO bonuses for resisting level-based poisons. For COnstitution-based poisons, the target adds their CO stat (not bonus). The description of luck-based poisons says nothing of any modifiers to the target's roll, it implies the raw roll is used.
My first question is, would you apply Racial RR modifiers for CO-based or luck-based poisons? They make some sense to me, for CO-based poison, but I could see going either way with them for luck-based poisons.