I'll also say this. Disneyland is the best park, hands down. I say this as a person who went to Disneyland as a WDW vet with a bit of a biased opinion against Disneyland. I wasn't sure what to expect. I had heard DCA was not a great park. All lies. Here is how I rank the Disney Parks I've been to:
Disneyland
Magic Kingdom
Disney California Adventure
Epcot
Animal Kingdom
DHS
Then the water parks of course. And this is not a knock on any Disney Park at all. But no doubt, Disneyland is the cream of the crop. It is #1. And I was surprised at how "Disney-like" and magical DCA felt. It was a really great park on its own. It just has a much more successful bigger brother next door, but in all seriousness, I thoroughly enjoyed that park.
Also, if you are going to Disneyland Resort do not expect to be able to have things to do for 10 days. Enjoy southern California off-site. Lots to do. You can easily put in 4 days in the parks/Downtown Disney though and you can do it a little more leisurely.
The attractions DL does better: Pirates, Small World
The attractions WDW does better: Splash Mountain, Tower of Terror
Everything else is pretty much the same but the difference is the things each park doesn't have that the other does:
Disneyland has: Mr. Toad, Snow White, Pinnochio, Alice in Wonderland, Casey Jr., Storybook Canal boats, Indy, Matterhorn, Captain EO
Disney World has: Carousel of Progress, Hall of President, Country Bear Jamboree
There is a better Toontown in Disneyland. There is a better Fantasyland in Disneyland by far. And I will say this, the whole idea that you are so close to the real world at Disneyland is meaningless the second you walk into the park. You feel like you are in another world, just like WDW.
Folks, on either side, don't ever miss the chance to visit both parks. So long as you can afford it, you aren't a true Disney fan if you are stubborn on either side.