Read it through once

In the first place, you are struck by the general contrast between these heads. Both are massive enough in all conscience; but there is a certain mathematical symmetry in the Sperm Whale’s which the Right Whale’s sadly lacks. There is more character in the Sperm Whale’s head. As you behold it, you involuntarily yield the immense superiority to him, in point of pervading dignity. In the present instance, too, this dignity is heightened by the pepper and salt color of his head at the summit, giving token of advanced age and large experience. In short, he is what the fishermen technically call a “grey-headed whale.”