$167/person$84/night
View DealShip comparison
Costa Diadema vs MSC Opera
Side-by-side cruise ship comparison. Costa Diadema wins 6 of 7 scored categories.
At a glance
Quick Compare
Category
Costa Diadema
MSC Opera
Size
132,500 GT
65,591 GT
Passengers
3,724
2,150
Year built
2014
2004
Crew ratio
3.0 guests per crew
3.0 guests per crew
Space ratio
35.6 GT per guest
30.5 GT per guest
Decks
No data
No data
Length
306 m
275 m
From price
$167 pp
$195 pp
The verdict
Comparison Verdict
Costa Diadema is the significantly larger vessel at 132,500 GT, 102% more than MSC Opera's 65,591 GT. Costa Diadema offers more personal space with a space ratio of 35.6 GT per passenger versus 30.5. Built in 2014, Costa Diadema is 10 years newer, an advantage for travelers seeking modern amenities and design.
| Category | Winner |
|---|---|
| Size | Costa Diadema |
| Capacity | Costa Diadema |
| Modernity | Costa Diadema |
| Service | MSC Opera |
| Spaciousness | Costa Diadema |
| Decks | No data |
| Length | Costa Diadema |
| Fleet Power | Costa Diadema |
Bottom line: Costa Diadema leads 6–1 across our categories, strongest in Size. Choose Costa Diadema for overall superiority; pick MSC Opera if its strengths matter more to you.
Decide
Which Ship Is Right for You?
Choose Costa Diadema if
- You want the newer ship (built 2014, 10 years newer)
- Size matters to you (132,500 GT)
- More onboard variety (3,724 guests)
- More space per guest (35.6 GT per guest)
Choose MSC Opera if
- More crew per guest (3.0 guests per crew)
- Lower fares per night (from $36 per person per night)
Prices
See Current Prices
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Fares
Sailing Prices
| Detail | Costa Diadema | MSC Opera |
|---|---|---|
| Cheapest | $167 pp | $195 pp |
| Per night | $84 pp | $65 pp |
| Departing | Oct 29 | Oct 29 |
| Duration | 2 nights | 3 nights |
| View sailing | View sailing |
Prices from Cruisebound, per person, for the sailing shown.
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FAQ
Frequently Asked Questions
How is the comparison score calculated?
We score 8 categories from spec data: size, capacity, modernity, service, spaciousness, decks, length and fleet power. Each category awards one point to the winning ship. A category where either ship has no data is marked No data and left out of the score.
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, and mass-market ships often fall between 30 and 40.
What does the passenger-to-crew ratio mean?
It is the number of guests for each crew member, shown as "3.0 guests per crew". Lower is better: more staff per guest usually means more attentive service. Luxury lines aim for fewer than 2 guests per crew, and large mainstream ships often carry 3 to 4.
Are the prices shown accurate?
Prices come from Cruisebound and are per person for the sailing shown. They change with cabin type, date and demand, so open the sailing to see the current fare.
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+ ships, and this page refreshes daily. An "Updated" date appears at the top when either ship's record changed in the last 30 days.
