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View Deal →Carnival 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 Carnival Firenze's 135,156 GT. Carnival Firenze offers more personal space with a space ratio of 32.8 GT per passenger versus 29.6. Built in 2020, Carnival Firenze is 3 years newer — an advantage for travellers seeking modern amenities and design.
Score: 4 – 3
Quick Compare
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Category
Carnival Firenze
MSC Seaside
Size
135,156 GT
153,516 GT
Passengers
4,126
5,179
Year Built
2020
2017
Crew Ratio
1:2.9
1:3.7
Space Ratio
32.8
29.6
Decks
14
—
Length
323.6m
323m
From Price
$330/pp
$387.8/pp
Comparison Verdict
MSC Seaside is the larger vessel at 153,516 GT — 14% more than Carnival Firenze's 135,156 GT. Carnival Firenze offers more personal space with a space ratio of 32.8 GT per passenger versus 29.6. Built in 2020, Carnival Firenze is 3 years newer — an advantage for travellers seeking modern amenities and design.
| Category | Winner |
|---|---|
| Size | MSC Seaside |
| Capacity | MSC Seaside |
| Modernity | Carnival Firenze |
| Service | Carnival Firenze |
| Spaciousness | Carnival Firenze |
| Decks | Tie |
| Length | Carnival Firenze |
| Fleet Power | MSC Seaside |
Bottom line: Carnival Firenze leads 4–3 across our categories — strongest in Modernity. Choose Carnival Firenze for overall superiority; pick MSC Seaside if its strengths matter more to you.
Which Ship Is Right for You?
Choose Carnival Firenze if...
- You want the newer ship (built 2020, 3yr newer)
- Better service ratio (2.9:1 crew ratio)
- More space per guest (32.8 GT/pax)
- Save $57.8/person on sailings
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.
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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.
