The music is more varied. For as stupid an understanding as he has of the historical figures, he has an interpretation of them that he sticks to and builds them as characters. Completely ahistorical characters, but characters nonetheless. It feels more like someone who knows how to make a musical but doesn’t remotely understand the material while this movie felt like it was someone who knew neither.
The Internet Historian, who leans a bit 4chany with some videos, had what I thought was a pretty good explanation. Basically the dude starting it was super naive and had no plan besides wanting to bring awareness to the issue. He was ironically pretty successful in hitting that goal, but having that actually happen-making everyone aware of something pretty evil but not having any actual ability to stop it-is probably enough to drive most people a bit insane.