Fares per person start at €510 on AIDAmar and €579 on AIDAblu. AIDAblu is the cheapest per night, at €61 per person. AIDAmar is the bigger ship, carrying 2,194 guests to 2,192. AIDAmar has the fewest guests per crew member, at 3.6 to 1. AIDAmar is newer, built in 2012 against 2010, though AIDAblu was refurbished in 2018.