The iconic Disneyland logo- with the "D", carries a lot of emotional weight with it. Seeing it brings pleasant memories of times in the park with family and friends. It's so good, that it's barely needed updating in 64 years- barring the brief time in the early 2000's when they tried to change it.
DCA's logo looks like a child got some cut out letters and tried to spell California. It looks amateur, young, and uninspired.