It's a supermarket turf war as both chains make changes to prices as the cost of living crisis continues.
Supermarket operator Foodstuffs is cutting the price of 110 of the most purchased grocery items by an average of 10 percent
Countdown has frozen the price of 600 items.
So, which is the better deal?
Lincoln University Agribusiness Professor Hamish Gow spoke to Corin Dann.