I know the original score is soft and calm, which in regards to the story makes perfect sense. The SSJ4 transformation seems to happen as a result of controlling the wild power of the great ape form, hence why the music in both the Japanese and English dub is the way that it is. HOWEVER... When I was a kid I was so hyped to see SSJ4 for the first time, it felt like such a grand moment. I created the music in this version to reflect how I felt as a child. I know it sort of goes against the context of the story yet it still works in its own way. Plus I added some guitars like the ones in the English dub score. If you listen around 1:17 you'll notice.