<p>If you have time then you should take both, cause being honest your standardized test scores are not up to scratch for these elite American Universities. SAT 1 is a little low, show aim at least higher then 2250, and your subject test scores are notmhigh enough as well (>750 at least), and as the two other guys have stated, your ECs are interesting, however I’m not sure the Olympiads you mentioned are prestigious (never heard of them here in QLD). Have you got accomplishments in the other Australian comps such as the AMC, AMO and the UNSW assessments? They could help. </p>