Catholic high school - advantage?

I don’t think it’s restricted to Catholic schools; I think some schools just have good relationships with certain colleges, for whatever region. My niece is in a Catholic school and they have good luck with BC, Scranton, Loyola, etc… My daughter is at a public in a different state and we have great luck with the same schools. Hard to know the science behind it, with legacy, athletes, etc… thrown in the mix.