Are you asking about differences between the parades in the different parks?
Animal Kingdom:
Mickey's Jammin' Jungle Parade
As expected, this parade has a jungle theme, and it is personally one of my favorites. The floats are all very colorful, and the parade has lots of unusual characters and costumes. The music is kind of tribal and bouncy, with lots of drums.
Route: Exits from Kilimanjaro Safaris, takes a lap around the Tree of Life, and returns to the place it stepped off from.
Disney's Hollywood Studios
Pixar Pals Countdown to Fun Parade
I personally haven't seen the parade, but I know it features Pixar characters.
Route: Steps off from the back of the park, near Star Tours, moves past the Hat and then ends at the front of the park.
Magic Kingdom
Celebrate a Dream Come True Parade
This parade went along with the "Celebrate" promotional campaign a few years ago. It has lots of streamers and dancing, with classic Disney characters. There is a catchy but repetative song that goes along with the parade.
Route: Steps off from the front of Main Street USA, moves down Main Street, turns left at the hub, goes into Liberty Square and Frontierland, and ends to the left of Splash Mountain.
Epcot does not have a parade right now. Hope this helps :wave: