Leaves in 8 daysDiamond Princess vs Ruby Princess
Side-by-side cruise ship comparison · Updated January 2026
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.
Score: 3 – 3
Quick Compare
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Category
Diamond Princess
Ruby Princess
Size
115,875 GT
113,561 GT
Passengers
2,670
3,080
Year Built
2004
2008
Crew Ratio
1:2.4
1:2.8
Space Ratio
43.4
36.9
Decks
—
—
Length
290m
290m
From Price
$971/pp
$1,101/pp
Comparison Verdict
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 |
| Decks | Tie |
| Length | Tie |
| Fleet Power | Ruby Princess |
Bottom line: Diamond Princess and Ruby Princess split 3–3. Choose Diamond Princess if size is your priority; choose Ruby Princess if capacity matters more.
Which Ship Is Right for You?
Choose Diamond Princess if...
- Size matters to you (115,875 GT)
- Better service ratio (2.4:1 crew ratio)
- More space per guest (43.4 GT/pax)
- Save $130/person on sailings
Choose Ruby Princess if...
- You want the newer ship (built 2008, 4yr newer)
- More onboard variety (3,080 guests)
You've compared the ships. Now see what they cost.
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Frequently Asked Questions
How is the comparison score calculated?
We compute scores across 8 categories using real spec data — gross tonnage, passenger capacity, crew capacity, year built, length, deck count, space ratio, and fleet power. Each category awards one point to the winning ship.
What is the space ratio and why does it matter?
Space ratio is gross tonnage divided by passenger capacity. A higher number means more space per guest. Luxury lines typically score above 40; mass-market ships often fall in the 30-40 range.
What does the passenger-to-crew ratio mean?
Passengers per crew member. Lower is better — more staff per guest means better service. Luxury lines aim below 2:1; large mainstream ships may be 3-4:1.
Are the prices shown accurate?
Prices are sourced from Cruisebound and reflect real-time availability. They may change based on cabin type, date, and demand. Click through to see the latest fares.
Can I compare more than two ships?
Yes — up to four ships. Use the search tool on the compare hub page to add additional ships.
How current is the ship data?
Specifications come from our database of 380+ vessels, revalidated every 5 minutes via ISR. The "Updated" timestamp shows when records were last modified.
