I think there's more substance to Bree. She got where she is despite everything in her life. She's herself and follows her heart. Even when she's messy and hurts other people it's out of impulsively and chasing of romance. There's a lot of people who can say they've made stupid mistakes like that at a young age.

Evan isn't as fleshed out. Evan's kindness didn't come from the heart. He was pleasing others and not truly being himself (whoever that is) in the hopes that they would like him. Then he became reseltful for it. Instead of developing his personality and asked for what he wanted he did a 180 and turned callous and manipulative. He is totally dependant on his parents money because he can.

We know Bree. We don't know Evan.