T-Rex: Large Jaws; Strong, Bone-Crushing Bite
Spinosaurus: Hand Claws for Slashing and Inflicting Gapping Wounds, Powerful Bite
T-Rex: Small arms, Usless in a Fight. If Head is Dammaged, Has almost NO Form of Attack, if falls down in the Fight, can't get up or the fall could KILL it.
Spinosaurus: Spine, if Hit could Paralize it.