National Geographic Endurance vs Ultramarine
Side-by-side cruise ship comparison · Updated January 2026
Ultramarine is the larger vessel at 13,000 GT — 6% more than National Geographic Endurance's 12,300 GT. National Geographic Endurance offers more personal space with a space ratio of 97.6 GT per passenger versus 65.3. National Geographic Endurance edges ahead in service with a passenger-to-crew ratio of 1.2:1, meaning more crew per guest.
Score: 2 – 5
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Comparison Verdict
Ultramarine is the larger vessel at 13,000 GT — 6% more than National Geographic Endurance's 12,300 GT. National Geographic Endurance offers more personal space with a space ratio of 97.6 GT per passenger versus 65.3. National Geographic Endurance edges ahead in service with a passenger-to-crew ratio of 1.2:1, meaning more crew per guest.
| Category | Winner |
|---|---|
| Size | Ultramarine |
| Capacity | Ultramarine |
| Modernity | Ultramarine |
| Service | National Geographic Endurance |
| Spaciousness | National Geographic Endurance |
| Decks | Tie |
| Length | Ultramarine |
| Fleet Power | Ultramarine |
Bottom line: Ultramarine leads 5–2 across our categories — strongest in Size. Choose Ultramarine for overall superiority; pick National Geographic Endurance if Service matter more to you.
Which Ship Is Right for You?
Choose National Geographic Endurance if...
- Better service ratio (1.2:1 crew ratio)
- More space per guest (97.6 GT/pax)
Choose Ultramarine if...
- You want the newer ship (built 2021, 1yr newer)
- Size matters to you (13,000 GT)
- More onboard variety (199 guests)
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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.
