Actually, the first version is the original recording by Dry Cell. The second is after they forced them to rerecord because Warner feared it sounded too much like Linkin Park. Jeff Gutt just happens to to sound like Chester. Jeff Blue actually planned for Disconnected and Hybrid Theory to be released at the same time, one was going to be the more metal side and the other was going to be the softer, rap filled side. But Warner chose one over the other.