ok maybe we can...kinda appraise the v-rex's jaw power
T-REX
40-foot-long
[...]The models suggest that an adult T. rex was capable of a maximum bite force of 35,000 to 57,000 newtons at its back
teeth.
http://news.nationalgeographic.com/news/2012/120228-t-rex-bite-bates-science-biology-letters-dinosaurs/
up to 6.8 metric tons (7.5 short tons) in weight.
http://en.wikipedia.org/wiki/Tyrannosaurus
V-REX
Vastatosaurus rex is the fictional descendant of Tyrannosaurus rex and is the largest predator on the fictional Skull Island, reaching lengths of up to 70 feet and weighing around 10 tons.
teeth.http://godzilla.wikia.com/wiki/Vastatosaurus_Rex
considering the vrex is much larger that would probably throw it in at least 45,000 to 70,000 newtons range. this is of course on the spot fuzzy math and you are welcome to challenge or amend it.
too bad about the apparently brittle teeth.