This may well have some legs, or at least a pair of trainers!
I think it will probably come down to semantics and lawyers. I understand that some of the brake duct parts on the pink Mercedes may have actually shared the same tooling to make some of the basic structure, but differ in detail.
Do bear in mind that the front wheel assembly is all wrapped in exactly the same tyre, on very similar wheels (or at least sharing some of the same tooling) with mostly the same brake callipers and again most teams using similar (if not the same)
wheel bearing.
Uprights do tend to be different as the geometry dictates, but there is only so much room in a 13" front rim and certainly the solutions found by F1 teams are tending to the same thing.
I wish I had the time and inclination to read through all the mountainous F1 regs, but I suspect this one could be a close call.
Unless, magically, as in the Ferrari engine case last year, there is absolutely nothing to be found........