NSW put border restrictions in place on 8 July (prior to this they were open).
Passenger numbers for the prior month (June).
Brisbane Airport : 184,616
Sydney Airport : 172,000
Both these numbers are well down on pre-Covid and I expect Sydney took in more international arrivals than Brisbane. Given the disproportionate population of the two states and QLD had closed borders till July 10 - it sure looks like one state is doing better than the other.
Interestingly for the same month the passenger numbers for a few other airports (we got out done by the Kiwi's)
Heathrow Airport : 320,283
Auckland Airport : 231,600
Hong Kong : 59,000
Changi : 48,200