I spend a fair amount of time in Mexico and prefer to stay at the W. It sounds like you prefer a St Regis type of property but the W is in the heart of Polanco
Great feedback.
This past year the W in NYC 48th/Lexington gave me a five day headache in a room barely 200 sq ft (an upgraded room, no less!), no coffeemaker despite repeated promises to deliver one and no space in the room to even drink coffee--turning the lobby into everyone's living room. And I mean everyone. No more W's for me, ever. And no more 'Whatever' @#$$@#@#$. I'm fine with Westins and like the Meridien even more. In China Sheraton is top shelf and I've been real happy with them.
That said, the Roma area sounds a lot like Montparnesse back before the internet? So it's the n'hood that draws me. In all honesty the difference in price at this stage is not the issue, rather it's the room/hotel quality level being ok and the area being sufficiently safe to walk around in at night.