Agreed. Point in fact, the Cenobites' M.O. is not to secure their own pleasure, per se, but to inflict punishment on those who go too far in their own searches for enlightenment. They may very well be what an Emperor's Child of the more generic mould (sadomasochism, reveling in extremes of pain and pleasure, etc.) might want to encounter, but I don't think they're alike to a degree where one seems like the other.