Fares per person start at €121 on Costa Smeralda and €131 on Costa Diadema. Costa Smeralda is the bigger ship, carrying 5,224 guests to 3,724. Costa Diadema has the fewest guests per crew member, at 3.0 to 1. Costa Smeralda is newer, built in 2019 against 2014, though Costa Diadema was refurbished in 2023. Costa Diadema runs 1–27 night cruises from Santos and Kiel, plus 20 other ports, while Costa Smeralda runs 2–17 night cruises from Santa Cruz de Tenerife and Las Palmas de Gran Canaria, plus 7 other ports.
