You're right. Some things are more, but I don't buy those. I save much more than my membership fee on the things I do buy.
Absolutely, remembering that Sam's is owned by Walmart, certain things at Walmart are always higher than Sam's and vice-versa.
Nowaday, the food sites, all you here is Costco, Costco, Costco so the owners of Costco must be shuffling money to them some how.
On rare, very rare occasions there will be comparisons heads-up, or which is better for which item.
Bakery goods, milk, cheese, some meats (large bags of snacks) are definetly cheaper at Sam's, but Sam's milk now comes in plastic jugs and dairy products in platic jugs go bad long before same item in card-board cartons.
Stay away from the Sam's premium meat dept. (not packaged) , if your store has one, a genuine butcher shop will be cheaper on average.