^ Jetstar use 2 doors and have a different cabin cleaning and catering standard (i.e. none)
So does NZ, they have upgrade most of their domestic jet gates to be A320 dual boarding friendly.
You'll also find on NZ domestic there cleaning standard is the same as Jetstar, the crew doing in the air. Seats are all black leather, they only put 2x bathrooms etc on board.
Under pressure NZ domestic can do an A320 turn around in 25minutes.