Beta Quest is just an Object Set Modifier, which is basically moidifications of the same area(like different layout, exits, clouds, and what not eg, the ganon cutscene, adult link, young link, and the opening FMA are all different object sets of Hyrule Field

).
But by the time we found it was actually that, everybody got comfortable with calling it Beta Quest. There's next to no real beta in Beta Quest
A few unsued object sets here and there (kokiri forest and jabu-jabu to name 2 off of the top of my head), but nothing major. Its all eye candy, really.
You need to do more then just use Beta Quest alone to find something useful
