You will find many similarities as far as food and cabins are concerned but then the differences start to be noticed. The deck games and activities on Sea Princess are not as complex as on Navigator. You will also notice that the style of activity is more British oriontated than Navigator and the quizzes definately so. Both have their own initiable styles and and there are very few disadvantages except that last time I was on Princess They charged for ice cream and that I objected to. You should enjoy every minute ....Neil's son...Fala.