The Grey hulk is the same as the green hulk. In the first hulk comic he was gray, but the color did not print right. So Stan Lee decided to make him green. grey hulk is also smarter then hulk and not...
No, but she is more intelligent. When Bruce transforms into the Hulk, his anger gets the best of him and he can't control himself, whereas Jen can easily transform to She Hulk at will. So no, She...