I noticed in the first one Kane was all deadset on killing everyone and not caring who he had to go up against. Lynch was sometimes nervous of the plans. In this one it's the other way around. Kane's the wuss, and Lynch is the guy always saying "**** it, let's kill em all" I guess whoever is the main character gets the balls
I think Kane and Lynch have a sort of Ying/Yang balance thing going on. When one's losing it, the other takes control, so it made sense for Kane to take over when Lynch started to crack up again. --- I never make stupid mistakes. Only very, very clever ones.