Premium Economy is a conventional PE seat, not the SpaceSeat, probably 2-4-2 and 19 inches wide, 38 inch pitch. This will be NZ's worst PE seat yet - inferior not just to 744 and 77W but even the 77E which is just an a Economy seat with extra recline.
I'm not so sure it will be the worst, it should be better than the 77E product surely and it may be a 2-3-2 configuration