Correct me someone if I'm wrong here, there is a lagoon by the WL, it's accross from where the Contemperary is. This is what they are referring to.
On the hotel choice, that's a hard one. Both hotels are quite stunning. They are both designed by the same architect, and if you see pictures, they have a lot of contruction similarites, exspecially the expansive lobbies.
I've never stayed at WL, but we did dinner there on night, and spend a few hours walking around. Now this was about 8:00 pm, but I found the lobby quite loud and very busy. Maybe we were there at a busy time. However, outside was calm, not too many people, and a nice romantic place to be.
On the other hand, we did stay at AKL. I love that resort. It too is ussaly quite, and I didn't find the lobby and inside areas to be as loud and busy (except around the two resturants). And it can be just as romantic at night if you walk around.
We will continue to go to AKL, and I'd personally choice AKL over WL, but they are both great places. Hard choice. Why not do a few days at both?