I'm belong to both. I like them both. Some stuff is basically the same, but both have things the other doesn't also.
Sams Club has deals all the time that basically make joining free. So that's worth it to me for the couple things we get there.
Costco does the cash back thing on top of some great prices, so by us buying some staples there like gas, TP, paper towels, garbage bags, laundry soap, coffee, batteries, vitamins, meds, etc we make our $130 back
Plus Costco is 3 miles from my house and 1 mile from my work so it is super convenient for even normal groceries.
Gotten some bigger stuff through Costco too, like car tires, refrigerator, TV, washer, all great deals.
As I type this, gas is $0.17 cheaper at Costco than the station down the road.
Just last week scored a bottle of Eagle Rare and a Blantons for the state min price too!
