744 ER
58J 36W 270Y = 364
A388
14P 64J 35W 371Y = 484
With 19 extra premium cabin seats and 101 extra economy there is a good chance that each flight may carry 100 extra passengers with 19 at a much better yield.
The aircraft will probably need 220-230 tonnes of fuel to do the mission.
At a MTOW of 569t that leaves 349-339t.
BEW is approximately 288t so useable load is 61-51t less water 1800kg and catering 7000kg.
42.2 - 52.2 tonnes available for pax @ 100kg per pax is 422 - 522 pax. However you look at it when you take out the Brisbane transit and add the extra seats it makes sense to run the 380 even with the extra fuel burn.