Spots going fastCosta Magica vs Diamond Princess
Side-by-side cruise ship comparison · Updated February 2026
Diamond Princess is the larger vessel at 115,875 GT — 13% more than Costa Magica's 102,587 GT. Diamond Princess offers more personal space with a space ratio of 43.4 GT per passenger versus 37.8. Diamond Princess edges ahead in service with a passenger-to-crew ratio of 2.4:1, meaning more crew per guest.
Score: 0 – 6
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Category
Costa Magica
Diamond Princess
Size
102,587 GT
115,875 GT
Passengers
2,716
2,670
Year Built
2004
2004
Crew Ratio
1:2.6
1:2.4
Space Ratio
37.8
43.4
Decks
—
—
Length
272m
290m
From Price
—
$971/pp
Comparison Verdict
Diamond Princess is the larger vessel at 115,875 GT — 13% more than Costa Magica's 102,587 GT. Diamond Princess offers more personal space with a space ratio of 43.4 GT per passenger versus 37.8. 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 | Diamond Princess |
| Modernity | Tie |
| Service | Diamond Princess |
| Spaciousness | Diamond Princess |
| Decks | Tie |
| Length | Diamond Princess |
| Fleet Power | Diamond Princess |
Bottom line: Diamond Princess leads 6–0 across our categories — strongest in Size. Choose Diamond Princess for overall superiority; pick Costa Magica if its strengths matter more to you.
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)
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Sailing Prices
| Costa Magica | Diamond Princess | |
|---|---|---|
| Cheapest | — | $971 pp |
| Departing | — | Aug 16 |
| Duration | — | 10 nights |
| View Deal |
Prices from Cruisebound. We may earn a commission at no extra cost to you.
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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.
