...and you believe that just because they are NZ owned they won't use every trick in the book to wrangle better prices out of their suppliers to increase market share and profit? Naive much?
There's quite a big difference because Foodstuffs (New World, Pak n Save) is a cooperative, remember stores are owner operated, suppliers can negotiate with individual stores and or regions.
With Progressive (Countdown) the supplier must do one nationwide deal with head office.
Progressive obviously have a stronger bargaining position.