What seems funny to ponyboy

Ponyboy finds it funny that the Socs- the Greasers' rivals, were just like him.

It seemed funny to me that Socs--- if these girls were any example--- were just like us. They liked the Beatles and thought Elvis Presley was out, and we thought the Beatles were rank and that Elvis was tuff, but that seemed the only difference to me. Of course greasy girls would have acted a lot tougher, but there was a basic sameness. I thought maybe it was money that separated us.