Spots going fastCosta Firenze vs MSC Seaside
Side-by-side cruise ship comparison · Updated April 2026
MSC Seaside is the larger vessel at 153,516 GT — 14% more than Costa Firenze's 135,225 GT. Built in 2021, Costa Firenze is 4 years newer — an advantage for travellers seeking modern amenities and design. Costa Firenze edges ahead in service with a passenger-to-crew ratio of 3.0:1, meaning more crew per guest.
Score: 3 – 3
Quick Compare
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Category
Costa Firenze
MSC Seaside
Size
135,225 GT
153,516 GT
Passengers
4,232
5,179
Year Built
2021
2017
Crew Ratio
1:3.0
1:3.7
Space Ratio
31.9
29.6
Decks
—
—
Length
323m
323m
From Price
—
$387.8/pp
Comparison Verdict
MSC Seaside is the larger vessel at 153,516 GT — 14% more than Costa Firenze's 135,225 GT. Built in 2021, Costa Firenze is 4 years newer — an advantage for travellers seeking modern amenities and design. Costa Firenze edges ahead in service with a passenger-to-crew ratio of 3.0:1, meaning more crew per guest.
| Category | Winner |
|---|---|
| Size | MSC Seaside |
| Capacity | MSC Seaside |
| Modernity | Costa Firenze |
| Service | Costa Firenze |
| Spaciousness | Costa Firenze |
| Decks | Tie |
| Length | Tie |
| Fleet Power | MSC Seaside |
Bottom line: Costa Firenze and MSC Seaside split 3–3. Choose Costa Firenze if modernity is your priority; choose MSC Seaside if size matters more.
Which Ship Is Right for You?
Choose Costa Firenze if...
- You want the newer ship (built 2021, 4yr newer)
- Better service ratio (3.0:1 crew ratio)
- More space per guest (31.9 GT/pax)
Choose MSC Seaside if...
- Size matters to you (153,516 GT)
- More onboard variety (5,179 guests)
You've compared the ships. Now see what they cost.
See Current Prices
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Sailing Prices
| Costa Firenze | MSC Seaside | |
|---|---|---|
| Cheapest | — | $387.8 pp |
| Departing | — | Aug 3 |
| Duration | — | 4 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.
