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[Raiden]

A Thanator...I dunno.

A T. Rex, if it grabbed one by the ribs, might be able to crush it to death. I'd be more interested in a Thanator vs. a Triceratops or a Stegosaurus, or maybe an Anklyodon.

The most interesting one to me would be a Gigantosaurus vs. a Toruk.

[Advent]

Originally Posted by Raiden

A T. Rex, if it grabbed one by the ribs, might be able to crush it to death. I'd be more interested in a Thanator vs. a Triceratops or a Stegosaurus, or maybe an Anklyodon.

The most interesting one to me would be a Gigantosaurus vs. a Toruk.

Would be quite interesting to watch all of them. A Gigantosaurus vs a Toruk would definitely be something though.

To be honest, Tyrannosaurus' aren't too appealing to me. Now these are scary:
Spinosaurus - Wikipedia, the free encyclopedia

Compared to a T-Rex:

Red: Spinosaurus. Grey: Carcharodontosaurus. Orange: Gigantosaurus. Green: ...T-Rex.

And apparently, they were more aggressive. And honestly, they do look pretty evil: