What would win in a fight a tyrannosaurus or a dinonicus?

Most of the fights would probably go to the Tyrannosaurus due to it's size and power as well as durability, Thanator's are most likely pure ambush predators from what little we know about it, it may have stronger body density than most of earth's living and extinct animals but I doubt it'd be able to withstand a Tyrannosaurus's bite, so 60/70% chance on Tyrannosaurus winning the fight but, in reality if the two coexisted it most likely would leave each other alone as smaller predators usually leave larger ones alone