Giganotosaurus.C was a huge carnivorous therapod or a MEGAtherapod that ruled the lands of South America, co-existing with other therapods like Ekrixinatosaurus, Buitreraptor and Alnashetri. If T rex was the Mike Tyson and Spinosaurus was the great Khali, then the Giganotosaurus was the usain bolt of the MEGAtherapods. But what would happen if it met the mighty T rex?
Giga was part of the Carcharodontosauridae family while the T rex was a completely different species, being part of the Tyrannosauridae family. T rex was Physically stronger, Smarter and had the stronger bite, whereas Giganotosaurus had more speed, was taller, longer and had stronger and longer arms (which were capable of lifting a fully grown SIBERIAN TIGER!).
In 1v1 battle T rex would wipe the floor with Giga by overpowering him in alsmost every way. But if Giga manages to make T rex trip (OFC by head butts) then the T rex doesn’t stand a chance.