Probably keep Babin and let Peek go if it's a choice between the two as he is the more complete player.
Babin is better against the run and Peek is better on Special teams, but as pass rushers they seem like halves of a coin. Babin has the multiple moves which he does not have the pure speed and quickness the set up properly, while Peek has the pure speed and quickness off the ball w/o any other moves. If you could combine them in one body you would have something.