How are Perry’s and Dick’s views of the future starting to diverge?

From Part II

"Dick and Perry’s relationship has become one of “mutual toleration,” and despite living in adjacent cells, they hardly communicate with one another, because Perry doesn’t like being overheard by the other inmates and guards. Perry especially dislikes Andrews, who is better educated than him and often corrects his grammar."

http://www.gradesaver.com/in-cold-blood/study-guide/section8/

"As the prisoners on the row are forced to confront the reality of their own impending deaths, each conducts himself in a characteristic fashion. Perry, who hates to think of himself at the mercy of the authorities, attempts to take matters into his own hands by starving himself. Dick, ever the pragmatist, accepts the sentence calmly, even good-naturedly, but concocts a number of schemes to free himself, including the appeals to the Kansas Bar Association. Andrews is by far the most complacent among them, declaring that “sooner or later we’ll all get out of here. Either walk out—or be carried out in a coffin. Myself, I don’t care whether I walk or get carried” (318)."