stubbed:
ZK-NZS = Number 1, but that's a brand new airframe. What about the existing retrofitted ones?
You need to compare the seat layouts to work out if you get an old, upgraded or brand new one or not. Even the old layouts you had two versions for short or long haul. After all the retrofits there should only be two versions the RR powered retrofit 787-9's and the new ultra long haul increased MTOW GE powered ones.
https://seatmaps.com/airlines/nz-air-new-zealand/boeing-787-9/

