london prolly has a lot more quantitative trading roles than sydney, yes sydney has a few major trading firms like optiver, vivcourt, susquehanna and a couple more + the banks but london is an international center for finance, plus every office of the firms i listed above also prolly has a office in london anyway. although from what i’ve heard in london it is much more competitive to get a job in quant trading (not to say sydney is easy but yeah)
in australia tbh there’s not really any uni bias, it is true that in trading firms there tends to be a higher volume of grads from the higher ranked unis like usyd,unsw, unimelb but id chalk this up to the grads from these unis just being more motivated, given that all the trading firms usually have several technical interview rounds that the uni u go to has no bearing on (aside from ur educational quality obviously, but they won’t not give you a chance because u go to a certain uni). essentially, for grad roles in sydney someone (or probably an ai now) will probably just check ur resume, and if u have a HD in a relevant degree you’ll be put through to the interview rounds. uni isn’t really involved as the interview rounds will weed out those who aren’t competitive enough anyway. im not sure if that’s how it works in london, it could be true that there is bias towards certain unis but im not really in a position to comment on that
in terms of unsw, looking at the leiden ranking (actually objective ranking of unis through scientific research) it’s top for compsci and math in the country, uts and usyd are just behind. from what i’ve heard (i go to uts but know people who go to unsw) it’s a pretty intensive program, drop rates are pretty high for compsci/math/acturial mostly because they have a high amount of content in only 10 week semesters. its not impossible obviously but it is a good and rigorous program, uts and usyd have slightly more chill programs depending on the degree but in turn you get more spare time which would make working on personal projects or internships easier, honestly it’s just a personal preference but unsw is the likely best out of thef 2 unis in sydney that offers acturial.
honestly idk if it’s worth it coming to sydney if u want to be a quant tho, london should have plenty of opportunities already. but unsw is a good uni and u certainly wouldn’t go wrong with picking their acturial / compsci degree