Question: how much bigger is harmony than oasis?
Answer: Move over Oasis of the Seas and Allure of the Seas. You're no longer the world's largest cruise ships. ... The Harmony of the Seas also has 2 more passenger decks, 43 more cabins, and can carry up to 5,479 guests (double occupancy) compared to the 5,408 on Oasis and Allure.