How our Bliss Filters work
Detailed side-by-side comparison of Oceania Cruises and Costa Cruises cruise ships
| Specification | Allura | Costa Diadema |
|---|---|---|
| Cruise Line | Oceania Cruises | Costa Cruises |
| Maiden Voyage | 2025 | 2012 |
| Year Refurbished | N/A | N/A |
| Adults Only | No | No |
| Specification | Allura | Costa Diadema |
|---|---|---|
| Passenger Capacity | 1,200 | 4,947 |
| Crew Size | 800 | 1,253 |
| Guest-to-Crew Ratio | 1.50 | 3.95 |
| Specification | Allura | Costa Diadema |
|---|---|---|
| Gross Tonnage | 67,000 | 132,500 |
| Length | 791 ft | 1,004 ft |
| Width | 89 ft | 122 ft |
| Ship Size Category | Medium | Mega |
| Number of Decks | 15 | 20 |
| Specification | Allura | Costa Diadema |
|---|---|---|
| Overall Cruiseable Rating | 9.0 / 10 | 8.0 / 10 |
| Roominess Score | N/A | N/A |
| Advised For | Cultural, staterooms, romantic, adults, spa and fitness, dining | Families, entertainment |
