Guitar is the exact same chart as the Guitar Hero version with the exception of the chorded HOPOs near the end.
Drum has been re-edited to fit more to how Rock Band drums are charted.
Bass for the most part had very minimal edits to accomidate for the open notes from Guitar Hero.
Vocals have been added to include harmony (Though there is an odd glitch in terms of with the phrase marker for harmony. If I can find the problem, I'll fix it.)
All E-H reductions is automated with the exception of Drums. Drum reductions have been manually edited.