I can't remember the rate of the Aloft Bangkok being higher than the Four Points Bangkok, but I just noticed 3 nights in March (16th through 18th) when the Aloft is at THB 3,021 while the Four Points is priced at THB 3,015.
BTW, for the same period, the ROSH, with its 500 amenity pts, happy hour drinks and food, lounge breakfast, river view and it their easy to get executive suite upgrades (for Platinum guests) is just at THB 3,078.