It would be pretty disappointing if we were unable to beat Australia in any of these friendlies. I generally think we have more players standing out for the national team compared to Australia and a lot of their goals from their past few games have come from set-pieces. Won't underestimate them though, it's been a while Socceroos, bring it on!
I agree, Australia will be big favourites. Their home record against us is pretty immaculate, out of both friendlies this is the one we're most likely to lose. It would be pretty awesome to spoil the party at Australia's last home game before they head off to a World Cup though.