Friday Night Funkin': Dusk n' Baki includes:

1. 4 weeks (one of them is hidden unless you beat all the other 3 weeks)

2. 4 songs (one of them is hidden if all 3 weeks aren't beaten)

While on the Friday Night Funkin': Dusk n' Baki Extras includes:

1. 2 extra weeks

2. 3 extra songs

3. And combat mechs.

Btw if you got any ideas for the mod, I want you to comment it down! If your idea gets in, you might be able to be in the Honorable Mentions!