They are clearly different parks.
I'm not sure Disneyworld is the park Walt wanted. He died 13 months into the project, and 5 years before WDW opened. So most of WDW was planned and built after his death. I think WDW would have been different if he had lived another 5 years.
Disneyland was 100% under his control.
Just seems to me, what park you grew up with shapes your view of what a Disney park should be. And the DIS is largely made up of WDW regulars.
Disneyland is my park. Went to WDW and was disappointed, largely because if so spread out. I spent way too much time in transit at WDW, and too little time in one of the parks.
And while I like California Adventure, I'm not sure Walt would have done things the same way. Even after the changes they had to make spending $1 billion to fix up things that weren't working.