carried it's a water park that is part of legoland, see here
florida.legoland.com/en/LEGOLAND-WATER-PARK/LEGOLAND-Water-Park/LEGOLAND-Water-Park/
They had different rides to the windsor one, we've been there as well, a couple of years ago. You can take a look at the sites and compare. For instance, there is no atlantis submarine ride. There are 4 mini coasters, a dragon one in kingdoms, a flying one in lego city, a dinosaur in explorers, and in technic and kind of car one. There is a laser ride in a pyramid section where you shoot targets, plus other rides too. I just found it a lot of fun, maybe as DS was a little older. No waiting times, no stress, but that may have been the time of year.
MK was just busy for us, yes some nice things, but gosh it was so crowded. We would have gone on maybe 4 or 5 rides all day. We stayed late for the light show and fireworks which was lovely, but I'm not sure I'd go back there in a hurry. They were very efficient clearing everyone on the mono rail too, so even though you're at the park until 10.30ish, it's quick to get out, then we grabbed a taxi from the epcot transit centre. It was $25 back to our hotel.