Skin & Bodycare: Myself, Sam's Club

Sam's Club or Costco ???

Hi, my friend took me to Sam's club this weekend and I liked a lot of their stuff.... So I went over to Costco and checked out their stuff and they also had quite a bit I could use.... Now I'm wondering which of them would be worth the membership fee.... Where do you shop and how often do you shop there ??? Thanks in advance !!!!!!!