Hi Magotom,
Ive spent plenty of time in NSW and Sydney, Currently live in Melbourne. Victoria in general gets more wind than Sydney, but on the flip side the wind we get can be really gusty.
As you might have read there's plenty good spots outside of Melbourne.
I would Say Victoria receives more consistent wind, but is a lot colder during winter.
I would live where your best work propects lye, with exception of supporting family members.