Side-by-side cruise ship comparison · Updated January 2026
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across 5 categories
Size
Based on gross tonnage and length
Capacity
Based on passengers and crew
Modernity
Based on year built
Service
Based on passenger-to-crew ratio (lower is better)
Spaciousness
Based on gross tonnage per passenger (higher is better)
Harmony of the Seas
Spectrum of the Seas
Gross Tonnage
Harmony of the Seas
226,963 GT
Spectrum of the Seas
169,379 GT
Length
Harmony of the Seas
362 m
Spectrum of the Seas
347 m
Beam
Harmony of the Seas
66 m
Spectrum of the Seas
41 m
Passengers
Harmony of the Seas
6,687
Spectrum of the Seas
4,246
Crew
Harmony of the Seas
2,100
Spectrum of the Seas
1,551
Decks
Harmony of the Seas
—
Spectrum of the Seas
—
Year Built
Harmony of the Seas
2,016
Spectrum of the Seas
2,019
Space Ratio
Harmony of the Seas
33.9 GT/pax
Spectrum of the Seas
39.9 GT/pax
Passenger:Crew Ratio
Harmony of the Seas
3.18 :1
Spectrum of the Seas
2.74 :1
| Specification | Harmony of the Seas | Spectrum of the Seas |
|---|---|---|
| Overview | ||
| Cruise Line | Royal Caribbean International | Royal Caribbean International |
| Class | Oasis Class | Quantum Ultra Class |
| Status | active | active |
| Year Built | 2,016 | 2,019Winner |
| Dimensions | ||
| Gross Tonnage | 226,963 GTWinner | 169,379 GT |
| Length | 362 mWinner | 347 m |
| Beam | 66 mWinner | |
| Capacity | ||
| Passengers | 6,687Winner | 4,246 |
| Crew | 2,100Winner | 1,551 |
| Key Ratios | ||
| Space Ratio | 33.9 GT/pax | 39.9 GT/paxWinner |
| Passenger:Crew Ratio | 3.18:1 | 2.74:1Winner |
| Build | ||
| Builder | STX France | Meyer Werft |
| Flag | Bahamas | Bahamas |
| IMO Number | 9682875 | 9778856 |
Harmony of the Seas is the significantly larger vessel at 226,963 GT — 34% more than Spectrum of the Seas's 169,379 GT. Spectrum of the Seas offers more personal space with a space ratio of 39.9 GT per passenger versus 33.9. Built in 2019, Spectrum of the Seas is 3 years newer — an advantage for travellers seeking modern amenities and design.
| Category | Winner |
|---|---|
| Size | Harmony of the Seas |
| Capacity | Harmony of the Seas |
| Modernity | Spectrum of the Seas |
| Service | Spectrum of the Seas |
| Spaciousness | Spectrum of the Seas |
Bottom line: Spectrum of the Seas wins more categories (3 vs 2), making it the stronger all-round choice based on current data.
Harmony of the Seas
Large 6,687-guest capacity offers competitive pricing
6,687 passengers means tons of activities
Built in 2016 with modern facilities — great for a first cruise
Comfortable atmosphere for two
Spectrum of the Seas
Built in 2019 with modern facilities — great for a first cruise
Large 4,246-guest capacity offers competitive pricing
4,246 passengers means tons of activities
Comfortable atmosphere for two
Free cancellation on most rooms
Bundle & save on your cruise trip
Medical, trip cancellation & luggage cover
We may earn a commission from partner bookings at no extra cost to you.
41 m |
| Draft | 9.3 mWinner | 8.9 m |
| Decks | — | — |
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