How our Bliss Filters work
Detailed side-by-side comparison of Costa Cruises and Regent Seven Seas Cruises cruise ships
| Specification | Costa Diadema | Seven Seas Mariner |
|---|---|---|
| Cruise Line | Costa Cruises | Regent Seven Seas Cruises |
| Maiden Voyage | 2012 | 2000 |
| Year Refurbished | N/A | 2018 |
| Adults Only | No | No |
| Specification | Costa Diadema | Seven Seas Mariner |
|---|---|---|
| Passenger Capacity | 4,947 | 700 |
| Crew Size | 1,253 | 445 |
| Guest-to-Crew Ratio | 3.95 | 1.57 |
| Specification | Costa Diadema | Seven Seas Mariner |
|---|---|---|
| Gross Tonnage | 132,500 | 48,075 |
| Length | 1,004 ft | 709 ft |
| Width | 122 ft | 93 ft |
| Ship Size Category | Mega | Small |
| Number of Decks | 20 | 8 |
| Specification | Costa Diadema | Seven Seas Mariner |
|---|---|---|
| Overall Cruiseable Rating | 8.0 / 10 | 10.0 / 10 |
| Roominess Score | N/A | 36.3 |
| Advised For | Families, entertainment | Cultural, staterooms, romantic, entertainment, spa and fitness, dining |
