Spots going fastExplorer of the Seas vs Mariner of the Seas
Side-by-side cruise ship comparison · Updated April 2026
Explorer of the Seas offers more personal space with a space ratio of 44.1 GT per passenger versus 36.7. Built in 2003, Mariner of the Seas is 3 years newer — an advantage for travellers seeking modern amenities and design. Explorer of the Seas edges ahead in service with a passenger-to-crew ratio of 2.6:1, meaning more crew per guest.
Score: 2 – 4
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Category
Explorer of the Seas
Mariner of the Seas
Size
137,308 GT
139,863 GT
Passengers
3,114
3,807
Year Built
2000
2003
Crew Ratio
1:2.6
1:3.2
Space Ratio
44.1
36.7
Decks
—
—
Length
311m
311m
From Price
$994.97/pp
$680.84/pp
Comparison Verdict
Explorer of the Seas offers more personal space with a space ratio of 44.1 GT per passenger versus 36.7. Built in 2003, Mariner of the Seas is 3 years newer — an advantage for travellers seeking modern amenities and design. Explorer of the Seas edges ahead in service with a passenger-to-crew ratio of 2.6:1, meaning more crew per guest.
| Category | Winner |
|---|---|
| Size | Mariner of the Seas |
| Capacity | Mariner of the Seas |
| Modernity | Mariner of the Seas |
| Service | Explorer of the Seas |
| Spaciousness | Explorer of the Seas |
| Decks | Tie |
| Length | Tie |
| Fleet Power | Mariner of the Seas |
Bottom line: Mariner of the Seas leads 4–2 across our categories — strongest in Size. Choose Mariner of the Seas for overall superiority; pick Explorer of the Seas if Service matter more to you.
Which Ship Is Right for You?
Choose Explorer of the Seas if...
- Better service ratio (2.6:1 crew ratio)
- More space per guest (44.1 GT/pax)
Choose Mariner of the Seas if...
- You want the newer ship (built 2003, 3yr newer)
- Size matters to you (139,863 GT)
- More onboard variety (3,807 guests)
- Save $314.13/person on sailings
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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.
