Uh-no. Again-Dilophasaurus was small, teensy compared to rex. It was about the size of utahraptor, but it was a little more delicate, which just proves my point. It also decidedly did not spit venom. it was pretty much the budget utahraptor with fancy crests on it's head. Also, they hunted in packs. There is still no way a whole pack of dilos could ever take on a rex and win in any universe-unless they were much, much bigger and much, much more bulky. Then yes, maybe. But that's not the point.