Western gorillas are smaller than the Eastern gorilla but not by much. They are very much the same in their physical appearance.
Western Gorilla Infographic
Amazing photo gallery about Gorillas. Male Gorilla Eating Grass.
Amazing photo gallery about Gorillas. Western Gorilla Close Up.
The Eastern gorilla is the largest primate in the world. There are a couple of sub species of it including the Eastern Lowland gorilla and the Mountain gorilla.
Amazing photo gallery about Gorillas. Eastern Gorillas In Uganda Rainforest.