An Aussie shopper has revealed she shaved more than $50 off the cost of her weekly groceries simply by switching from Coles to Aldi, reigniting the debate about supermarket prices.

Sharing photos of the haul spread out on her kitchen counter, the woman said: “I’ve been seeing a lot of posts that the price between Aldi and Coles is not much different.

“If I had bought all this only at Coles, it would have cost me $348.95. I took my Coles list to Aldi and purchased everything that was cheaper there and all my fruit and veg at the grocer. In total, this shop was $297.65.”

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Her post sparked a lively back-and-forth on the cost of living and ways to save money on essential items – with some saying they still preferred to shop at Coles or Woolies and used rewards points and loyalty programs to reduce their grocery bills.

“I did this once!” one wrote. “Bought all my stuff at Aldi, then went home and put all the stuff in a Woolies online order. Even picking home brand stuff and stuff on special at Woolies, the total was $250 and Aldi was about $200. Such a big difference.”

Others agreed, with one saying: “I’ve definitely noticed fruit and veg at smaller local stores and local IGA discounts is soooo much cheaper then Coles and Woolies, and sometimes Aldi.

“Aldi is cheaper for sure with 90 per cent of products, but Aldi also doesn't have everything Woolies and Coles have.”

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A third added: “Yep, Aldi is still definitely cheaper for me. I know many people like the rewards from Woolies and Coles and I do have Everyday Extras myself, but even the points and savings from this program don't make up for the amount I save each week at Aldi.

“I do shop specials at Coles and Woolies, but shopping there just because of the points seems silly to me when I would be spending, on average, about 15 per cent more to do so.”

However, others said it was cheaper for them to shop at Coles or Woolies.

“Still cheaper for me to do a big shop at Coles,” one wrote. “Between the specials and points from rewards programs adding up so quickly, I definitely save overall at Coles. Still go to Aldi for a few things I like though.”

Some said they paid $19 a month for programs such as Coles Plus - which includes free delivery on orders over $50 and can work out cheaper if you have weekly or fortnightly home deliveries.