Paul Holden is a Soc who used to be Darry’s friend and football teammate in high school but later becomes his opponent in the rumble.
When the greasers and Socs meet to fight, Paul steps forward to face Darry. Their history makes the moment more meaningful: they once respected each other as teammates, but now they are on opposite sides because of their social classes. Ponyboy notices this and reflects that the only real difference between them is opportunity—Paul was able to go to college, while Darry had to give that up to support his family.
This encounter highlights how the conflict between Socs and greasers isn’t about personal hatred so much as social division. Friendships like Darry and Paul’s can be broken simply because one person is from the wealthier West Side and the other from the poorer East Side. It shows how easily people are pushed into rivalry by circumstances rather than who they are as individuals.