Leaves in 11 daysCrystal Symphony vs Seven Seas Mariner
Side-by-side cruise ship comparison · Updated January 2026
Crystal Symphony is the larger vessel at 51,044 GT — 6% more than Seven Seas Mariner's 48,075 GT. Seven Seas Mariner offers more personal space with a space ratio of 68.7 GT per passenger versus 60.2. Built in 2001, Seven Seas Mariner is 6 years newer — an advantage for travellers seeking modern amenities and design.
Score: 5 – 2
Quick Compare
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Category
Crystal Symphony
Seven Seas Mariner
Size
51,044 GT
48,075 GT
Passengers
848
700
Year Built
1995
2001
Crew Ratio
1:1.5
1:1.6
Space Ratio
60.2
68.7
Decks
—
—
Length
238m
216m
From Price
$4,200/pp
$14,949/pp
Comparison Verdict
Crystal Symphony is the larger vessel at 51,044 GT — 6% more than Seven Seas Mariner's 48,075 GT. Seven Seas Mariner offers more personal space with a space ratio of 68.7 GT per passenger versus 60.2. Built in 2001, Seven Seas Mariner is 6 years newer — an advantage for travellers seeking modern amenities and design.
| Category | Winner |
|---|---|
| Size | Crystal Symphony |
| Capacity | Crystal Symphony |
| Modernity | Seven Seas Mariner |
| Service | Crystal Symphony |
| Spaciousness | Seven Seas Mariner |
| Decks | Tie |
| Length | Crystal Symphony |
| Fleet Power | Crystal Symphony |
Bottom line: Crystal Symphony leads 5–2 across our categories — strongest in Size. Choose Crystal Symphony for overall superiority; pick Seven Seas Mariner if its strengths matter more to you.
Which Ship Is Right for You?
Choose Crystal Symphony if...
- Size matters to you (51,044 GT)
- More onboard variety (848 guests)
- Better service ratio (1.5:1 crew ratio)
- Save $10,749/person on sailings
Choose Seven Seas Mariner if...
- You want the newer ship (built 2001, 6yr newer)
- More space per guest (68.7 GT/pax)
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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.
