Yes, they do. The rooms have been renovated in the last year, and they are identical to the Swan rooms. Most Sheratons have Sweet Sleeper beds, but for some reason the Dolphin has Heavenly Beds like the Swan and other Westins. Perhaps so they can charge the same amount for the Dolphin as they do for the Swan.
The Dolphin beds are slightly smaller than the Swans. They are oversized doubles instead of queen size. That means they are one inch smaller than a queen bed. We sleep on a queen at home, and didn't notice the difference at the Dolphin.