Overall Air NZ due to better pitch and wines, but i'd consider against cost. United PE decent and i personally find the seat more comfy with the shape of the back rest giving better lower back support and i slept well in it. The Chui review looks at stats like pitch to rate them, not comfort from actually sitting in it and trying them all. United PE food straight from Polaris so usually a steak option, and big portions. Both UA and NZ made by LGE in AKL, so same kitchen. Id consider against schedule and price and not rule UA out