I would prefer UNSW too.
A lot of the stuff I heard they teach at USYD ain't very useful. Also, if you're doing combined degrees at USYD, it's often 5 years, but at UNSW you're only required to stay for 4 years. If you're considering accounting cadetships, I was told that you could go ANYWHERE but USYD because USYD structures the timetable with shitty starts and it's hard to personalize as well, whereas other unis let you personalize your timetable so that you can fit in part time work and uni more easily.
I also heard USYD is harder to get better grades compared with UNSW. Any comments on this? This is what you gotta take into consideration too, because grades do matter in commerce to an extent.
USYD is more convenient than UNSW, I have gotta say though.