Webafter wandering through the aisles at both retailers, aldi and lidl really do start to feel like they’re twins and not just sisters. Webit's a battle of german supermarket superiority. Lidl is one of the most notable rivalries across grocery chains, and both chains have a long and somewhat intertwined history. Webso which is really better: Aldi is consistently the cheapest supermarket in our monthly price analysis, but lidl always comes a very close second.