Horses mouth
Suggest you look very carefully at what you get for your hard earned $$$. UNSW may appear to be $20K more expensive, but at UNSW you will end up with a degree from a University in the top 100 worldwide, with a dedicated flying school owned and operated by the university. At Griffith you will have to find instructors, make your own bookings, and manage your own flying training program with some outside commercial flying school, and I bet they don't claim to cover all your costs. You will also study in an environment with a much lower ATAR (OP). This may well cost you more in the end!
So to mix metaphors, look the horse in the mouth to ensure you don't end up being sold a pup!
Either way, please report back on your progress to let us all know of your experiences.
Good luck
Seabreeze