Here we have a highly inaccurate photo of Scotus, Aquinas, and Aristotle embracing and agreeing to disagree. Scotus is saying, "real being is univocal to God and creatures, substance and accidents". Aquinas is saying, "Real being is analogical to God and creatures, substance and accidents". Aristotle, ever the gentleman, is saying, "Univocity stands with analogy".
Aristotle: Didn't he say that being is said in many ways? In any case, he was on the analogy side of things, though what became known as "analogy" in the west was really pros hen equivocity, while Aristotelian analogy is rather a proportional relation between four terms discussed in the Nicomachean ethics.
Aquinas: I don't think he makes the distinction between real and cognitive being. And besides, it is pretty clear from the summa and de pot. dei that he is thinking of analogy on both the real and conceptual level (all that talk of there being two different ratio's kind of rules out a harmony with Scotus).
Scotus: While he does in fact hold to a distinction between esse reale and esse cognitum (I may blog on this later-see for now Ord II d.1 q.2), he definitely does not think univocity holds on a real level (though this is debated and sometimes rejected by some early Scotists. And then there's Henry of Harclay, who thinks there are only grades of univocity and leaves no place for analogy). Rather, univocity is predicated of concepts and the trick Scotus pulls off is to deny the isomorphism between things and concepts (at least in this instance) and have a common concept without a corresponding common reality. Well, that's a bit muddled, but I'll probably go into it more a bit later.
So all in all, the Scotus scroll-comment is wrong. Source: its a detail from a "estampe" from the cover of the Melanges Berube.