...Buuuuuut that isn't what occurred now is it? As far as the fight Sanji had with Queen is concerned and not some hypothetical battle where sanji starts off with exoskeleton and Ifrit Jambe, then no it was not a neg diff and Sanji in fact high to extreme diffed Queen in his fight with him. This becomes even more evident with how Sanji was forced to rely on tactics that left him gassed to the point where he fell unconscious shortly after the fight. This implies that with out PIS in the form of Queen being a complete dent head and going after Osome mid battle instead of just biding his time like he WAS doing, Sanji would of exhausted all of his stamina with his pseudo invisibility, and thus would of lost. This however is not what happened within the Manga so yeah. High to extreme diff, no question about it.