Have you seen them both in person?
1) Disneyland's tree isn't illuminated in LED lights until after the fireworks. So for most of the night, it's not lit like that.
2) It may photograph like a "ball of lights," but in person, it certainly doesn't look like one.
Disneyland's tree is elegant and modern-looking. Many trees at Walt Disney World are similarly beautiful (the resort trees come to mind), so it's surprising to me that the Magic Kingdom's looks so dated.
I was going to say it may the way it is subjected in the photo that I perceived that way but I did not want you to view it as an attack on your photo. I for one hate LED lighting on trees, houses, etc as it is not my style. The only place LEDs have a purpose to me is for camping, spelunking, or a flashlight.
On the note of LED post pyrotechnics what is it illuminated with prior to pyrotechnics?