We were on the Dragon Pearl III which is bigger, a 10 cabins with 3 decks, inclusive of a sundeck.
This company has 14 boats and conduct an exclusive boating for non touristy areas of their own. This is good and bad, if you want exclusivity, its great and of course much less crowded, but,
you'll miss seeing the Surprise Cave and also the sunrise and sunset as they would not acquisce to request for a view of the sunset during boating. The food though is exquisite and delicious.