Bhelen is a ruthless bastard who will do whatever it takes to win. He never considers cheating (lying, stealing, intimidating, whatever) to be anything more than the most intelligent path. That said, he's also the one who wants to abolish castes and strengthen ties with the surface. Not a nice guy, but he gets things done.
Harrowmont is a kindly old gentleman who never wanted to be king and is only running because he promised his friend he would. Believes in the Caste system and feels dwarves should actually back *away* from the surface. He is honorable, just, and kind, which is just about the worst combination possible for any dwarf looking to get into politics.