The Question and Answer section for Henry IV Part 1 is a great resource to ask questions, find answers, and discuss the novel.
You kind of answered your own question!
Hotspur is rather out of the times, rash, quick to judge, and narrow minded. Hal, on the other hand, is well-rounded, well-traveled, and thoughtful. He has the ear of the common man and considers the common man friend rather than subject.