What does Cherry say is the real separation between the Socs and the Greasers?

Cherry says the biggest difference between the Soc and the Greasers is that the Greasers are emotional.

"No," Cherry said slowly when I said this. "It's not just money. Part of it is, but not all. You greasers have a different set of values. You're more emotional. We're sophisticated--- cool to the point of not feeling anything. Nothing is real with us. You know, sometimes I'll catch myself talking to a girl-friend, and realize I don't mean half of what I'm saying. I don't really think a beer blast on the river bottom is super-cool, but I'll rave about one to a girl-friend just to be saying something." She smiled at me. "I never told anyone that. I think you're the first person I've ever really gotten through to."