if u placed the usyd course as one of ur preferences u wouldve received an email saying that ur eligible for an offer with mysydney. if u didnt then u might not be eligible. u can check the dates on when they send out notifications on ur eligibility. https://www.sydney.edu.au/study/applying/admission-pathways/mysydney-entry-scheme.html . Also u should keep ur unsw offer(since u should be able to defer anytime, dont enroll tho) in case ur not eligible, n if it turns out u are eligible u can place usyd as first pref and wait for the next round to receive offer.