Can't comment on ant of the competitions themselves, but some things to keep in mind:
I imagine WDW is a lot more inclusive. You can take magical express from the Orlando airport, stay on one of many many many hotels on property, and use WDW transportation while there.
There isn't a super easy way to get to Disneyland. Flying in to LAX is likely the cheapest, but also a PITA. Orange County or Long Beach are a bit more convenient. There are only two hotels on property: Disneyland Hotel & Grand Californian. They are both within walking distance of both parks. Disneyland use to use the convention center for overflow parking back in the day, so it's walkable from the parks...but it's not a super easy walk. There are many other hotels in the area that are not on property and are likely cheaper. You will likely need a rental car.