The discussion in the Luxury hotels forum is actually pretty interesting.

It primarily speaks of brands (the original topic) vs. individual properties, although the latter on both sides are included & as some have noted, are subjective.

http://www.flyertalk.com/forum/luxur...-starwood.html

I haven't stayed there since I haven't been to Spain in a few years, but The Cotton House, Autograph Collection gets excellent reviews.

Cheers.