It is interesting. However, I would caution us from assuming the
EZ-Answer reply that Disneyland is only a little,
tiny locals-only park that certainly never compares favorably with the
MASSIVE Magic Kingdom Park.
The truth is that Disneyland in Anaheim, California is the favorite theme park for 20 Million Southern Californians, but it is also a world-famous tourist destination in its own right. And it's been that way since the 1950's, and likely won't be changing that attendance-mix anytime soon.
There's a reason there are
20,000 hotel rooms just in Anaheim alone, many within walking distance of the park. That's also why your hear so many Australian accents while waiting in line, and see all those gaggles of very polite Japanese Office Ladies buying up every Duffy item in sight, and Taiwanese and Korean tour groups being led by the dozens into Pirates of the Caribbean by their flag-waving guides. Not to mention all those nice folks from Washington, Oregon and British Columbia in their expensive Columbia Sportswear outfits but very, very pale legs and arms!
Those are demographics, often free-spending demographics, you don't see much in WDW.
And there's also the key fact that while Disneyland is geographically smaller than the sprawling Magic Kingdom, it packs in about 15 more rides and an extra major entertainment spectacular that the Magic Kingdom lacks. Of those 15 additional rides Disneyland has, four of them are major headliner E Tickets; the Indiana Jones Adventure, Matterhorn Bobsleds, Star Tours, and Finding Nemo Submarine Voyage. Disneyland is a park that literally has rides stacked on top of other rides (Alice In Wonderland caterpillar-cars travelling over Mr. Toad's Wild Ride, the Monorail zooming over Autopia freeways and Submarine caverns, Splash Mountain logs whizzing by docking Davy Crockett Canoes and a passing Sailing Ship Columbia, etc.),
Disneyland also has multiple layers of nighttime entertainment smooshed in next to each other, scheduled within minutes of each other; the nightly summertime swing dancing orchestra at Plaza Gardens pausing to clear the dancefloor for the nightly Magical fireworks out in the Central Plaza next to Frontierland as it fills as the lobby area for the second Fantasmic! performance of the night on the Rivers of America.
To claim that Magic Kingdom Park is the primary global Disney theme park experience, while Disneyland simply acts as weekend hangout for a few hundred thousand Annual Passholders living between Ventura and San Clemente is a really massive over-simplification of the reality of both parks.
But... there's also something to the fact that for the last seven or eight years Disneyland has really polished its crown as the Flagship of the Disney properties, and done nothing but improve, add, burnish, and expand its already fabulous offerings. At the same time that WDW management took a noticeably different tack with their Magic Kingdom Park, to the point where the vaunted FLE doesn't add anything capacity-wise, but simply replaces lost ride count in a one-for-one swap. The results of that are showing up in the annual attendance rankings, to be sure.