User blog comment:UltraMegaDude/Will Rexy fight the Giganotosaurus in Jurassic World: Fallen Kingdom?/@comment-2001:5B0:45D7:C220:0:FF:FEBF:47C0-20180320210449

Giga would win. Definitely. Here's why...

1. Size and strength. The largest T. Rex was 40 feet. Gigas could grow to 48, maybe even 49.

2. Agility. Giga had a long, whiplike tail. This would have enabled it to make sharp turns and be very agile for its size.

3. Speed. T. Rex could only run 12 mph. Giga could do 18.

4. Bite. Giga didn't exactly have the same bone-crushing bite as T. Rex, in fact its bite was only one-third as strong. However, its ultimate weapon was its teeth. They were thin, but serrated, and extremely sharp. They were designed to rip through flesh and hide like paper. This would cause even more damage than the bone-crushing bite of T. Rex, tearing open arteries, shredding muscle, and causing extreme shock.

5. Crests. Giga had a pair of large, thick crests running down its snout, and a pair of horn-like crests in front of its eyes. Normally, you would think the crests would just be for display. However, they were unusually thick and strong. They could have served as a battering-ram on its head for knocking over smaller theropods. If Giga knocked over T. Rex, it wouldn't have been able to get up because of its puny arms.