I liked the original vocal of the HAND chorus line better - not much different, but a bit better. Why didn't they just stick to "believe", it would have fit with the new lyrics and kept the original number of sylklables. Oh well. The "a capella" part of the original was GREAT, the new riff is simpler but catchier, and the new solo is also better, even though a Bad Name-ish, classical 80s run-up of the scales at the end would have truely been the cream on the top of it.
And if only they'd combined the best of the two songs into one ultimate version... oh well.