Well...my UCAS reference was completed by my head of year on just general information in how I perform in my subjects, what role I have in school life, my predicted grades etc. On my OAF reference (which I haven't actually heard) they have basically written how I am a suitable student for PPE at Oxford. I'm not really sure if they have put anything else down, as we're not allowed to read it but it's definetely not the same one as for UCAS.