Was just at the world in June (21-29).
Ohana dinner was $34.99 adult/ $16.99 kid. Beverages included except for specialty drinks--Tinker Bell punch for my niece was additional.
At Cape May Dinner, beverages were included in buffet price--we got iced tea, sodas, and chocolate milk--and there were no separate beverage charges on our check. Price was the same as Ohana.