The nutritional breakdown is where things start to differ a little bit. Costco's lasagna is larger, boasting a total of six servings, whereas the Trader Joe's one has four total servings.

Many of them held the same product, which made me realize that there is one freezer find that I had yet to try — Kirkland Signature Italian Sausage and Beef Lasagna. After tasting this Costco-favorite ...