Go Mel U. No question. So what u do 6mths more.
1) Melbourne is more fun, period.
2) MelU's rep is unbeatable.
3) Canberra is f*ck boring.
4) If u decide to switch unis, esp with ur faculty (biz) u can
consider other unis established in biz, eg Monash and RMIT, both
also in Melb. Being in MelU, u have no problems transferring.
5) Employers here and there will both view MelU higher than ANU.
Employers here will also see ur 1.5yrs as possibly a "shortcut
degree". Being in MelU helps buffer this misconception. Being in
ANU won't.
6) Melbourne is more cosmopolitan, with more asian students. You
won't feel as alienated as if u went Canberra.