These are stronger than the rex, and tame one of these beasts instead of some old rex. 1. they get an underwater buff when up to mid body in the water and farther. 2. on two legs their attacks are faster and stronger then a rexes but they walk slower,and on four legs they are faster, but not as strong. If a tamed one is following you, they will do this automatically, when riding you must do it on your own. 3. They're easier to tame then a rex! So if you're debating on taming one of these bad boys, or the infamous rex, choose this dude. These beasts need more recongition. One like=one spino fan!