Kid and Pulver have very different styles of fighting. One thing is Jens is actually a lefty, while Kid is right-handed but boxes south because of wrestling. You'll see this becomes apparent as Kid leads in with a lot of right hands, and in his fights the punch count is actually around 2 to 1 for every right punch and left.
Yamamoto also relies on a lot of athleticism and explosiveness. He lunges in with punches and throws hard combinations while moving in and out. Pulver is more of a counter-puncher, and he stays in the pocket while covering up, usually looking to land a left hook.