I regularly buy my groceries at Publix and Lidl but I find I usually see better deals at the latter. Levon Clark/Shutterstock, Remigiusz Gora/ShutterstockMy family brought the same grocery list to Lidl and Publix to see which had better prices.The same or incredibly similar products were often at least 50 cents cheaper at Lidl.Overall, I found I could spend $40 less on groceries at Lidl than at Publix on this trip.