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)
Diamond Princess
Ruby Princess
Gross Tonnage
Diamond Princess
115,875 GT
Ruby Princess
113,561 GT
Length
Diamond Princess
290 m
Ruby Princess
290 m
Beam
Diamond Princess
38 m
Ruby Princess
36 m
Passengers
Diamond Princess
2,670
Ruby Princess
3,080
Crew
Diamond Princess
1,100
Ruby Princess
1,100
Decks
Diamond Princess
—
Ruby Princess
—
Year Built
Diamond Princess
2,004
Ruby Princess
2,008
Space Ratio
Diamond Princess
43.4 GT/pax
Ruby Princess
36.9 GT/pax
Passenger:Crew Ratio
Diamond Princess
2.43 :1
Ruby Princess
2.80 :1
| Specification | Diamond Princess | Ruby Princess |
|---|---|---|
| Overview | ||
| Cruise Line | Princess Cruises | Princess Cruises |
| Class | Grand Class | Grand Class |
| Status | active | active |
| Year Built | 2,004 | 2,008Winner |
| Dimensions | ||
| Gross Tonnage | 115,875 GTWinner | 113,561 GT |
| Length | 290 m | 290 m |
| Beam | 38 mWinner | 36 m |
| Draft | ||
| Capacity | ||
| Passengers | 2,670 | 3,080Winner |
| Crew | 1,100 | 1,100 |
| Key Ratios | ||
| Space Ratio | 43.4 GT/paxWinner | 36.9 GT/pax |
| Passenger:Crew Ratio | 2.43:1Winner | 2.80:1 |
| Build | ||
| Builder | MHI Nagasaki | Fincantieri |
| Flag | Bermuda | Bermuda |
| IMO Number | 9228186 | 9378462 |
Diamond Princess offers more personal space with a space ratio of 43.4 GT per passenger versus 36.9. Built in 2008, Ruby Princess is 4 years newer — an advantage for travellers seeking modern amenities and design. Diamond Princess edges ahead in service with a passenger-to-crew ratio of 2.4:1, meaning more crew per guest.
| Category | Winner |
|---|---|
| Size | Diamond Princess |
| Capacity | Ruby Princess |
| Modernity | Ruby Princess |
| Service | Diamond Princess |
| Spaciousness | Diamond Princess |
Bottom line: Diamond Princess wins more categories (3 vs 2), making it the stronger all-round choice based on current data.
Diamond Princess
Well-suited for cruise newcomers
43 GT/pax means plenty of quiet space
Good value for money
Good range of onboard options
Ruby Princess
Well-suited for cruise newcomers
Large 3,080-guest capacity offers competitive pricing
3,080 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
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9.5 mWinner |
8.6 m |
| Decks | — | — |
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