Next time I go to New York (though I don't know when that will be because according to Chinese astrology I have been warned against traveling north, northeast, northwest this year) I'll be checking out the new Dover Street Market, where every brand has its own unique tableau: newyork.doverstreetmarket.com
When I was in Bangkok, malls were also set up this way, with clear differentiation of brands. It really adds to the shopping experience, though I got lost many times because the boutiques are not set up in typical American mall grid style. You just wandered from one "set" to the next.
It's at 60 Lexington Ave.