I agree with previous posters. But, I'll add that DL had, to me, a much more laid-back, slower-paced feel. Because it is smaller and because more locals are there, people aren't frantically trying to "fit everything in." My DH and I have taken a kid-free trip to both WDW and DL, and so my thoughts on DL are from an adult-only perspective.
When we arrived at our hotel (The Disneyland Hotel - LOVED it!!!), Chip was in the lobby *watching cartoons* with a couple of kids - there wasn't anything for him to be doing at the time! (As an aside, later a family with a young girl who had significant physical impairments came in and I got to witness one of the sweetest interactions, between her and Chip.) Later that day, Goody was in the lobby greeting people as they arrived - again no wait line or anything! Talking about different! Characters in the parks rarely had long lines, and it was more how I remember WDW when I was a very young girl. I also thought the food was better. One of the down sides was that it seemed the rides broke down a LOT. Usually they would have them up and running within an hour or less, but somewhat frustrating. However, because the parks are smaller, it was easy to come back by (or check the app) to see if it had re-opened.
Probably more answer than you bargained for, but it got me reminiscing. Since we are so far away from DL, it was a really special treat to go. One day I hope to be able to take the kids, too, because it really was one of my favorite trips.