WDW is an entirely different experience. I am afraid, from a ride perspective, you might be a little disappointed. DL basically has all the rides concentrated into 2 parks, that are really more the size of 1 park in WDW. You will spend a lot of your day at WDW getting around from place to place. Each park has a couple of headliner rides, and then a bunch of smaller ones (and each park in general has fewer rides overall). WDW has a lot of educational exhibits and other side things that are not really part of the DL experience (mostly due to lack of space). For strictly a ride experience, I like DL better. The mindset is different in WDW. Think of it more as a large resort rather than an amusement park. Restaurants, scenery, the monorail, the onsite resorts, are all part of the experience at WDW and what make the difference between it and DL. Resorts have their own set of activities that can round out a vacation.
Like it's been said above, there are a few rides unique to WDW, but most of the better ones have been made into counterparts at DL or vice versa. Check out touringplans and easywdw if you want a rundown of the rides and where they are located and in which park. But PLEASE don't stop at the rides. You will notice that here on the forums, there are entire areas dedicated to restaurants and food, and that is a big part of a WDW vacation. They may not all be Michelin starred, but the theming Disney brings to the eating experience is as great as the rides, and much more enjoyable than standing in a line to see it. Eating in the castle will give you an average banquet quality meal, but the experience is awesome- from the decor to the princesses (and I have a son- they get a sword
! Eating in the Beast's castle is fun as well. There is a reason why you have to sit at your computer 180 days out to make dining reservations. People really like the Disney dining experience.
Epcot is set up like a World's fair, so it has some fun rides, and the lines get long, but they also have a lot of exhibits and entertainment. I know some DL vets that love it because it's so different and some others that think it's boring. It's really personal taste.
You can do extra activities like the Behind the Seeds Tour, or scuba diving in their tank, which I've heard is an awesome experience. Yes, they add to the cost, but they also give you something unique to do. There are all sorts of extra tours that are really cool and can add a lot to your vacation- from morning surf lessons in their wave pool to safaris if you stay at the Animal Kingdom Lodge, to Segway Tours and Behind the Scenes Tours. You can also do standard resort activities like boating, parasailing, fishing, etc. WDW often gets really crowded in the afternoons, so escaping to a more relaxing activity can be really nice.
Staying at a great onsite resort really adds to the experience as well. Disney has some beautiful and impressive hotels. My personal favorites are the Animal Kingdom Lodge and the Polynesian Resort. Staying onsite gets you nice perks, and decent transportation options (depending on the resort- I use a car when staying at AKL so I don't have to wait for buses or stand in a long line waiting for a bus at the end of a long day). Beach Club is also nice if you think you will be spending a lot of time in Epcot. Also, remember that Florida is HUMID - which often means musty in some hotels. I have not had an issue with mustiness in an onsite hotel, but I have had a lot of problems with it in offsite hotels and condos. They save money by keeping the air off if a room isn't occupied, and offsite hotels have a much greater variation in occupancy than onsite hotels (which is kept above 80%). Even 4 star hotels from well known brands can have these issues in Florida, so just check out Tripadvisor, etc. before your stay if you stay offsite.
My last advice is get used to walking, because you will be walking a LOT! A lot more than DL. But it means you don't have to feel guilty for all of the yummy food indulgences! Use a touringplan or easywdw recommendation for rides and ride times to save you a bunch of time. It really does, and it's important because they balance standing in line with walking across the park. Sometimes it makes sense to walk across the park to another major ride early in the morning so you stand on your feet for less time overall. Do your feet a favor and heed the advice of some ride experts.
This wasn't really about the rides, but at WDW the rides are only a small part of the experience.
