My fiance and I did the Dolphin Encounter at BLue Lagoon. There is a deck area that for those not willing to swim with the dolphins can watch from. The trainers were nice and we had a great time. I would say though that you get to interact with the more then on the Altantis based on Altantis description. At Blue Lagoon we fed them, dance with them, got kisses, kissed back, they splashed us and took us for a ride by pushing their noses against our feet. They put in small groups too. We had about ten in ours. They keep families together. But I think ten is the biggest they go. There is a beach area that you can hang out at after. We didn't cause our day at Nassau it rained. Didn't mind it when swimming with the dolphins we were wet already but you cant enjoy a beach the same. The boat ride is a little long, it stops at Altantis on your way out there. That is the only stop, but they let you know how often it is running. By the time we swam with them, went to the shop to get/wait for our photos the boat was back with minutes to spare. Hope this helps. Enjoy whichever you decide on.