I wanted to do this for awhile now but never got the chance to do it until now.

In short Pre 1.6 and 1.6+ are separate category's mainly because of the new Helios + aggressive mode mechanics, Retro Hijinks no longer being RNG (making it take a bit longer to beat the minigame), and added an option to skip later cutscenes. (PBF is also split into separate versions)