Here's Shaviro's home page. In the "essays and papers" section one can find chapter drafts from his book on Whitehead. This is interesting from chapter 2 on Whitehead's eternal objects:
"Eternal objects thus take on something of the role that universals...Platonic forms and ideas played in older metaphysical systems. But we have already seen that, for Whitehead, 'concrete particular fact' cannot simply 'be built up out of universals'; it is more the other way around. Universals...can and must be abstracted from 'things which are temporal.' But they cannot be conceived by themselves, in the absence of the empirical, temporal entities that they inform. Eternal objects, therefore, are neither a priori logical structures, nor Platonic essences, nor constitutive rational ideas" (18).
This one later on refers to Layman's notion of recurrent pattern:
"Actual entities continually perish; but the relations between them, or the patterns that they make, tend to recur or endure. Thus it is not 'substance' that endures but 'form.' And even forms do not subsist absolutely, but continually 'suffer changing relations'" (19).
I'm not going to argue how Whitehead sees it. What I see here is differance as a recurrent pattern that repeats or iterates, but itself arises from, and cannot be separated from, temporal actual occasions (suobjects). And which changes with each of those actual occasions. It is in a sense like Bryant's virtual substance, or an eternal object as described above, which is both a universal aspect within a particular manifestation.
Also see this post on image schemas. These are pre-linguistic, embodied, non-dual 'categories' that do not divide but connect us to the world. These basic categories (differentiations) provide the ground from which later abstract, dualistic thinking develops. And they are neither an a priori particular nor universal, but are in the middle of any nested abstract hierarchy. They function very much like differance, and may in fact be another way of describing a similar (if not identical) universal and embodied 'pattern' born from the very specific and particular instantiations that give rise to it.
At least in reference to human beings. I could though stretch a similar idea by what underlies an image schema in the basic categories that inform any suobject, using Bryant's notion of translation. Image schemas then would just be a more emergent, human development of this basic 'universal' differentiation (differance) inherent to any suobject.