Thanks for the advice.

So as far as Marriott brands are concerned, they are using Ritz Carlton Reserve as a 'rival' to Aman, and perhaps St Regis as a 'rival' to Four Seasons?

I have also found that recent JW Marriott hotels have become more and more like W hotels, for example the design of the new Phu Quoc resort in Vietnam looks like something out of the Caribbean! Not what you would expect from JW Marriott at all.