Fares per person start at €218 on Sapphire Princess and €391 on Sun Princess. Sun Princess is the cheapest per night, at €48 per person. Sun Princess is the bigger ship, carrying 4,300 guests to 2,670. Sapphire Princess has the fewest guests per crew member, at 2.4 to 1. Sun Princess is newer, built in 2024 against 2004, though Sapphire Princess was refurbished in 2018.