I got my 2 aussie dragons from Bert too ...he's a wonderful man!
I have a large pool (20 soon to be 50 gallons)...with very large grapevine and mounted trees around it.
I have a 90 basking spot and a 110 basking sot and one in the middle. The cage is hot at the top cooler at the bottom (the way it would be in nature) and unlike asian ragons they regulate their own humidity with their pool. I notice mine shed quite often and during those times they will soak in the pool for longer periods of time.
They eat quail, nightcrawlers, pinkies, supers, crickets and whatever else I put in to be honest.
If your husbandry is good with the asian, the aussie will be no problem. Just be sure you get the dragon from a good breeder (Bert) and also make sure your dragon is free of parasites and in good health before introducing another dragon.
Honestly you should even consider ordering a pair. I ended up with 2 and had to worry about size difference problems and also I paid shipping twice...should have just got 2 right away!!
Berts email: Timo2@earthlink.net
Tell him Nicole said hello 
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NiCoLe RuSSeLL
"Cross a line enough times and after a while it ceases to exist"