What is the difference about trex and stegosaurs?

Similarities:

Stegosaurus and Triceratops were both ornithischian, or bird hipped, dinosaurs. They were both herbivores.

Differences:

Triceratops had a very large head compared to its body, while Stegosaurus had a very small one. Triceratops was adapted for consuming tough vegetation, while Stegosaurus had to eat only tender plants.