Which is the most bougie Costco location?

My wife and I are cruising through Miami next week and heard their Costco locations have many items for well-heeled buyers that you can't find at other locations. We're interested to see what Costco dangles in front of high net worth individuals in that area.

This prompted two larger questions—what are some of the most high-end Costco locations and what do they carry there that may differ from most other locations?

Too, are the stores broken into separate tiers similar to Rouse's and is that information posted anywhere we can view to see which is the most high-end for a given area?