Kratos
Super Freak
Good eye for detail, man!
Was wondering about this too, so I checked the backstory on the VS. dio. That T.rex is meant to be a subadult male, whereas the T.rex in the maquette is a male of extremely advanced age. A lot of species have those sorts of traits that don't begin to manifest until later in life. If you were to compare the appearances of a Saltwater crocodile suspected to be nearly a century old with another Salty that's a subadult, you're going to find two animals that look COMPLETELY different. Even in a lot of modern raptor species, plumage coloration, talon length, and more heavily ossified brow ridges make older adults look unrecognizable from their younger days. Happens in most species at different points in the life cycle. Wild stuff, and I'm glad SS took this route.
You truly are the Dr Allan Grant of the Sideshow Freaks