Just to clarify, I think he's a good player and another decent signing by Vlade, but I have no expectations for him to become anyone's mentor. Still, for this money you'd be hard pressed to find a better SF.
Caron comes from very much the same background as Ben. If you doubt his 'mentor' label, I would take a look at the videos already posted in the Caron Butler thread and get to know a little more about him.
Dude was a 2x All Star and has a decade of playoff experience. "Mentor" or no, he's the classic experienced vet signing that knows what it takes in the league, and you can insert in big/shaky moments and know you're going to get smart decisionmaking.