They are totally different lines. But I like them both. I feel that to get the most out of your NCL experience, it is worthwhile to try as many of the specialty dining venues as possible. To us, it is worth the extra money. We really enjoy the variety. I would recommend the newer NCL ships such as Pearl, Gem or Jewel, possibly Jade.
The spa area on these ships are very nice and they have facilities for both men and women to enjoy.
We like the wine tasings and martini clinics, its a great place to meet really nice people and the sushi is very good.