Most of the med schools don’t reveal the proportions that ATAR, UCAT & interview contribute to the final score & ranking, but since most applicants who get an interview would have already achieved very high ATARs & UCAT scores, it’s likely that the main discriminator would be the interview. I imagine someone with an ATAR of 99.1, UCAT of 97 and an interview score of 90 is going to get in well ahead of someone with an ATAR of 99.95, UCAT of 97 & an interview score of 70 in any med school except USyd.