User blog comment:UltraMegaDude/Will Rexy fight the Giganotosaurus in Jurassic World: Fallen Kingdom?/@comment-2001:5B0:45D7:C220:0:FF:FEBF:47C0-20180320210449/@comment-30261954-20180320224236

1, Size doesn't matter in this fight, and if anything, I'm pretty sure recent finds have shown that T.rex is even more durable than what the franchise shows.

2.No dinosaur had a whiplike tail.

3. The current speed estimate is around 30 mph.

4. The only point that makes sense, except that it would do more damage, what would do more damage, slicing with a knife, or having a large chunk of flesh torn out.

Also, Giganotosaurus didn't use it's arms or crests in fights, the arms were to small, and crests are used for nothing but display. And you don't have to use your arms to get up, along with this, T.rex probably did  use it's arms to hoist it's self up.