How our Bliss Filters work
Detailed side-by-side comparison of Costa Cruises and Princess Cruises cruise ships
| Specification | Costa Diadema | Ruby Princess |
|---|---|---|
| Cruise Line | Costa Cruises | Princess Cruises |
| Maiden Voyage | 2012 | 2007 |
| Year Refurbished | N/A | 2018 |
| Adults Only | No | No |
| Specification | Costa Diadema | Ruby Princess |
|---|---|---|
| Passenger Capacity | 4,947 | 3,082 |
| Crew Size | 1,253 | 1,210 |
| Guest-to-Crew Ratio | 3.95 | 2.55 |
| Specification | Costa Diadema | Ruby Princess |
|---|---|---|
| Gross Tonnage | 132,500 | 113,561 |
| Length | 1,004 ft | 950 ft |
| Width | 122 ft | 118 ft |
| Ship Size Category | Mega | Large |
| Number of Decks | 20 | 19 |
| Specification | Costa Diadema | Ruby Princess |
|---|---|---|
| Overall Cruiseable Rating | 8.0 / 10 | 8.0 / 10 |
| Roominess Score | N/A | 36.8 |
| Advised For | Families, entertainment | Staterooms, romantic, spa and fitness |
