In a fight between Spike as a Dinosaur (maybe Spinosaurs size) and a Tyrannosaurus, who do you guys think would win?

Tyrannosaurus, mostly because it has the deadlier bite and a body perfectly adapted for killing large animals, but in a very realistic scenario, there won't be a fight since even a predator as ferocious and powerful as Tyrannosaurus rex, would be very cautious or would just leave Spike alone, since in the dinosaur's mind, Spike would be a much bigger and pretty strong opponent. Dinosaurs are really just animals, they're not monsters, they're not killers for the fun of it (as movies led us to believe), they are animals for animals sake.

Because they are animals, they never want to risk injury by fighting anything that looks like it can defend itself successfully, not unless they are really desperate for food in a carnivore's case. The only reasons an animal like Tyrannosaurus would ever get into a fight with Spike are these;

(1) It had no other choice and is desperate for food…

(2) Spike put himself in a position where a predator like Tyrannosaurus will seize the opportunity to kill prey with little risk of injury…

(3) If the Tyrannosaurus claimed an area its territory, it would see Spike as potential competition for the resources in the territory. Thus, it would first try to scare Spike into leaving, if that doesn't work, then the T. rex will resort to fighting the 'intruder'…

That's my answer, and before you say anything, I know a lot about dinosaurs in a scientific standpoint, and used logic to answer your question. The only reason they would blindly fight each other for no reason, is if the Tyrannosaurus, isn't a real Tyrannosaurus…