Ok so I shop both (& have a sams club too lol we’re all over the place). Aldi for me: I get my husbands junk cereal, bagged lettuce, organic milk, frozen vegetables & then I buy random things from the specials section. I do not like the meat from there and the Aldis near me doesn’t have great produce. Costco is my go to for scripts, hubs glasses, travel deals, gas, I buy 95% of our meat/poultry from there. Fresh fruit and veggies. I just break things down and freeze it (meat, bakery items).