Leaves in 10 daysRuby Princess vs Sun Princess
Side-by-side cruise ship comparison · Updated April 2026
Sun Princess is the significantly larger vessel at 175,500 GT — 55% more than Ruby Princess's 113,561 GT. Sun Princess offers more personal space with a space ratio of 40.8 GT per passenger versus 36.9. Built in 2024, Sun Princess is 16 years newer — an advantage for travellers seeking modern amenities and design.
Score: 1 – 6
Quick Compare
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Category
Ruby Princess
Sun Princess
Size
113,561 GT
175,500 GT
Passengers
3,080
4,300
Year Built
2008
2024
Crew Ratio
1:2.8
1:2.9
Space Ratio
36.9
40.8
Decks
—
—
Length
290m
345m
From Price
$1,488/pp
$2,329/pp
Comparison Verdict
Sun Princess is the significantly larger vessel at 175,500 GT — 55% more than Ruby Princess's 113,561 GT. Sun Princess offers more personal space with a space ratio of 40.8 GT per passenger versus 36.9. Built in 2024, Sun Princess is 16 years newer — an advantage for travellers seeking modern amenities and design.
| Category | Winner |
|---|---|
| Size | Sun Princess |
| Capacity | Sun Princess |
| Modernity | Sun Princess |
| Service | Ruby Princess |
| Spaciousness | Sun Princess |
| Decks | Tie |
| Length | Sun Princess |
| Fleet Power | Sun Princess |
Bottom line: Sun Princess leads 6–1 across our categories — strongest in Size. Choose Sun Princess for overall superiority; pick Ruby Princess if Service matter more to you.
Which Ship Is Right for You?
Choose Ruby Princess if...
- Better service ratio (2.8:1 crew ratio)
- Save $841/person on sailings
Choose Sun Princess if...
- You want the newer ship (built 2024, 16yr newer)
- Size matters to you (175,500 GT)
- More onboard variety (4,300 guests)
- More space per guest (40.8 GT/pax)
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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.
