Wow this is tough!!
I'm going wit Speed Demon right now, only because of the flawless bridge and arrangement
I think it's because there's more to think of when I think of Speed Demon, the Video, the look, and everything, but with WYWTOM, there's nothing that I can think of if that makes any sense, due to it having no single and no really mentions.
I love Why You Wanna Trip On Me though, the vocals are so fierce and sharp, and the harmonies in the chorus are so gentle and clear. I've always loved and appreciated that contrast. Lyrically it's brilliant as well, the topics are still as relevant today 26 years later. These are some of the best lyrics on an MJ song that he had no hand in writing since Rod.