having flown both in the last year, NZ Y+ is light years ahead of SQ Y+. if you're comparing NZ283/SQ285, the times are similar enough to choose based on seat
NZ Y+
- 41-42" pitch- business catering (packaged slightly differently)
- use business toilets and seen as a more premium cabin- small amenity pouch
- served by business/Y+ crew (less stretched)
SQ Y+
- 38" pitch- catering is economy. Basically the different between Y+/Y meal trays on SQ is that the Y+ has a small appetizer like a pasta salad or something- no amenity anything- served by Y crew