Would you rather work for Sephora or Estee Lauder/Bloomingdales?

It depends on your ultimate objective. If you are young and hip and want to grow with a developing company with innovative ideas do Sephora :) (My Favorite-haaha:))

If you want a stable conservative more traditional company do the other-always steady employment and a respected name on your resume :)

I would look at the benefits package for both companies and then consider your career goals. If you're looking for a summer job to just pay bills and meet people - take the one that offers the best benefits.