The outlets have styles that are made strictly for the outlet. If you ask them, they'll even tell you. And they occasionally get styles from the MK stores, but not often because the stores discount the merchandise themselves. If you ask at an MK store, or over ear a customer comparing the merchandise in the store to the outlet, you watch the employee aghast at the comparison... It's as if you just shot their puppy! Fabric & colors will vary, but most often they are not the same quality as the flagship styles.
Outlet stores do also have styles MK's don't. But some styles, like the Jet Set Continental are priced higher at the outlet... Seriously! I wanted the white from Christmas, but MK was out, so since we were at the outlets I looked & it was $30 more... Um, no, that's not happening... Even for a girl who wanted it sooooo bad! So, I order it online.
I always purchase at the MK store. I love the service (champagne or Fiji water), and they call whenever new styles arrive that they know we'll love. They even sent a card when the baby was born

(thinking hubby and i spend a little too much time there, lol)
Either way, the products are cute, fun & great for storing all your goodies :)