Sold under the Member's Mark label, Sam's Club may not have the same cult following, but in 2021 alone, they sold 450 football fields' worth of pumpkin pies.
Both pies have similar ingredients, although Sam's Club has more preservatives and thickeners listed, which aren't without value but change the consistency.
The Costco and Sam's Club pumpkin pies have 12 servings for each pie. A Costco pie has slightly fewer calories, fat, sugar, and carbs than a Sam's Club pie.