hmm i know this is a few months late but i thought ill reply anyways lol
UWS advanced: the first i would say 2 years is basically the same as the normal science degree, however u need
to be a high achiever to stay in advance (get like D average) and then you will go into alot more detail to watever u major in
(this is tha parra campus im talkin about)
Usyd just b of science - you got alooooooooot more variety in ur subjects (asin parra has like 5 majors u can chose from usyd has 50 lol)
and watver subjects u do -> there are the advances subjects to it..does that make sense? asin there is the normal stream; then there is advanced for that same subject (but u need to have decent marks to be able to do it)
honestly i would say go to watever is more convenient: ive studied science at both unis =]
hope that helps mate eventhough is v late =D