Originally Posted by kyanar

There is no trans-tasman flight run by NZ offering either of your combinations. Flights trans-tasman are either widebody 3-class (Y/A/C - 777, 787) or they are 1-class (Y only - 737, A320). BNE is served near exclusively by B773 and B772, so three classes are available.

(Some flights offer Space+ - this is not Premium Economy and to my knowledge cannot be upgraded to with instruments)