Two Business Insider reporters compare Norwegian Breakaway and Norwegian Prima.Norwegian Cruise LineWe sailed on an older and newer ship on Norwegian Cruise Line: 11-year-old Breakaway and two-year-old Prima.Breakaway was larger but had markedly less exciting family-friendly amenities.Mass-market cruise lines have been building flashier ships with more pay-to-play activities.A lot can happen in nine years — more than two presidential terms and your child's high school and college graduation, for example.In the case of Norwegian Cruise Line, nine years means the difference between a bare-boned ship and one with show-stopping amenities.Two Business Insider reporters sailed on Norwegian's 11-year-old Norwegian Breakaway and two-year-old Norwegian Prima.