Looks like Resorts World has "subdivided" the rooms / suites, etc. to include these 2 non-casino hotel complexes. The 3 of them have complimentary reservation systems & brands from different parts of the globe, so probably a win-win for everybody. Like the multiple non-casino hotels at Caesars, Mandalay Bay, and especially at Aria.
I wonder if this was always the plan, or if Resorts World off-loaded some of their capacity (and risk) more recently, given new realities?