The Oasis is by far the largest at 220,000 and 5,400 passengers at double occupancy. Epic is 153,000 and 4,200 passengers at DBL OCC. Each ship will be introducing an Aqua park. In addition each ship will have their own unique new features.
NCL Epic: 1) first ice bar at sea where the walls, seats, bar, everything is ice. They will loan you faux fur coats to wear. 2)Dine under the Big Top. A Cirque show while you dine. 3)Blue Man Group will be performing on the ship. 4) Second City Group Comedy club.
Oasis: 1) First Merry-Go-round at sea. 2)First Zipline at sea. 3) 7 unique neighborhoods like (Central Park with live trees and grass, Boardwalk-a Coney Island event) 4)First two-story cabins (Limited), 5)First Cupcake shop at sea. 6)Two Rock Climbing walls. 7)First three deck levitating lounge.