Not entirely sure what a September or August download option may indicate, however "v1.1" and "Rev A" roms are generally just bug fixes or copies released by the developers with content added/removed. One good example would be with Ocarina of Time on the N64; the original version (1.0) included what sounded like islamic chants in the fire temple theme, while later versions removed this. Another example would be Mystic Defender on Sega Genesis; in the original version one of the characters appears nude after defeating the final boss, while a later revision features the character in a tattered dress instead.
"I think that the problem with this video is it is highly derivative of many popular bands within the genre. Although when viewed on its own merits, it does have a deeper groove. However what it has in groove, it lacks in originality. One can't help but be reminded of such bands as Pearl Jam, White Zombie, Suicidal Tendencies and other bands that bear the mantle of so called "Alternative Rock". One is even reminded of Lorie Anderson when she wore curlers. Hehehmhm! This video speaks less to the heart and more to the sphincter. In closing, I think Korn would do well to learn more from -"