We go to WDW frequently and have started adding DL to the mix in recent years. Personally, I love DL more. It seems more laid back than WDW. Love the mint juleps and of course the dole whips. If you can, see about a reservation at the Blue Bayou and request a waterside table to watch the boats from pirates go by. The Haunted Mansion at DL is cooler IMO...especially when it switches to Haunted Mansion Holiday! Get to DCA early and head to Cars Land. Definitely make sure you get a fast pass for Radiator Racers. Overall, you'll have a great time! We usually go for 3 days, but would love to do 4 or 5. While there isn't as much to do as there is in WDW...4 parks vs. 2...there are still plenty of things to do and see!