The numbers between UCLA and Berkeley have been essentially identical for many yeas (.1 GPA average here, 10 points on the SAT there). I can’t imagine any student applying to UCLA because they think they will get in, but then NOT applying to Berkeley because they don’t think they will get in. That just doesn’t add up to me.
I think a lot of people want to live in Los Angeles, especially the Brentwood/Bel Air/Beverly Hills area, in which UCLA is nestled right in the middle. I love Berkeley personally, but I don’t think the town offers the same universal appeal.
Just my two cents.