Here's my take on Disney World versus Disneyland.
If going to Disney is all about parks and attractions for you, then, in many respects, Disneyland is superior to Disney World. At Disneyland, you have as many attractions in two parks (that are right next to each other) as Disney World has in four parks (that are spread apart). And, I'd argue that the top 10-15 attractions at Disneyland are actually, on average, somewhat better than the top 10-15 at Disney World (for, example, Radiator Springs Racers, is, IMO, the best attraction at all 6 US Disney parks). Plus, Southern California has, on average, better weather than Central Florida. That being said, there's nothing at Disneyland that compares to Epcot World Showcase or Animal Kingdom. Conversely, there's nothing at Disney World that compares to Cars Land.
Parks aside, where I think Disney World beats Disneyland is in the immersive resort experience. At Disney World, if you stay on property, you enter the Disney bubble even before you leave the airport (once arriving at Magical Express). And once on Disney property, you're immersed in Disney as far as the eye can see. In contrast, at Disneyland, you're on a small island in the middle of Anaheim. In addition, Disney World has 20 themed resorts and over 60 table service restaurants. In contrast, Disneyland has only three hotels and about a dozen table service restaurants. While I'd argue that the quality of the resort and restaurant offerings is just as good, if not better, at Disneyland than Disney World, the variety doesn't even come close.
In short, we enjoy the Disneyland parks just as much, if not more, than the Disney World parks. Be we enjoy the entire vacation experience more at Disney World.