The biggest difference between the studios in the Lagoon tower and the Kalia tower is that the Kalia tower has a lanai (balcony) and the Lagoon does not. To me, the Lagoon feels like you are in a large closet with a small window it is hard to see the water from, where the Kalia, although I think it is a little smaller, feels like a proper ocean view hotel room.
We also don't cook in the room, just microwave leftovers and the fridge for coffee cream and drinks is perfect.
The only other small drawback to a studio, and this applies to both towers, is that they have an adjoining room door with the place next door which isn't very soundproof.