I know that Williams-Sonoma also owns Pottery Barn and a few other stores, but I'm trying to figure out what the real difference is between the products at Williams-Sonoma compared to Pottery Barn so I know which suits my fiancee and I better when registering. It seems Pottery Barn has more home goods while W-S has more cooking and kitchenware. Is my comparison correct? What are the other main differences between the two?