The one at GardenWalk was already claimed as a JWMarriott, so that's taken. The architecture just reminds me of some Four Seasons that I've seen, but it also rules out the contemporary/sleek 4-Diamond brands like W or Conrad. I suppose it could be one of those Starwood faux boutiques "Luxury Collection" places that isn't branded as anything but something vaguely related to the local culture. Hilton and SPG both have several high-end divisions of luxury hotels not branded as anything Hilton or SPG, to try and take on the hipster boutique hotels the upscale, childless under-40's love.
Kind of like InBev-Anheuser creating fake microbreweries to sell beer to 28 year olds who wouldn't be caught dead holding a Budweiser at a party.
They'd probably call it something like
"The Grove House - A Luxury Collection Property" or some silly name, and create a story panel in the lobby about the genteel orchard owners gathering for sociables in a stately home in the middle of the Anaheim orange groves in the 1920's.
But those vaguely tropical yet mostly French Colonial mint green mansard roofs just say Four Seasons to me for some reason.