This is an interesting one and would be quite something if it was to set a precedent. A NZ couple took Emirates to a disputes tribunal after booking a trip with EK in business class. They claimed that EK uses the new 777LR or A380 seat in their advertising in NZ and were shocked to find they had an outdated 777-300 with angle flat seating on their flight from AKL to DXB. EK claimed that it is in their contract of carriage that they can substitute aircraft at any time. The dispute tribunal however claimed that this however wasn’t a one off equipment change but the aircraft that EK regularly rosters to NZ because the aircraft with newer cabins are allocated other routes.

Source: Stuff March 13, 2023 15:59 UTC