You don't need a degree to fly in Australia.
CASA couldn't give a rat's if you have a degree or not. They just want you to pass their exams.
QF might state certain academic achievements but that's at high school level only.
Ask yourself why so many uni's are now stopping Aviation orientated degrees in Australia?
I'd recommend Tech.
Most people don't really mature untill they have left formal full time education. (I base this on what I saw when I was working at uni for over 8 years + what mate's have said too).