Sam's Club or Costco?

Hello, I'm in the process of getting a membership to either Costco or Sam's, but I want to know what do y'all recommend.

A little background: We are only two adults and one 13 month old baby, so yes we might buy in bulk but not enough to afford both memberships. I have had Sam's before so I have a grasp of their offerings, and on the plus side I have a Sam's in town.

As for Costco, we don't have a Costco in town so I would have to order online and ship home (which I don't even know if they do) since the closer Costco is more than an hour away and my baby hates the car seat. I would consider Costco if they have a better organic/non-toxic selection.

Anyways, which would be better? TIA