First leak by a country mile. The new one's definitely improved a few small things here and there but with the guitars buried in the mix the whole song's had the life sucked out of it so a bit of polishing and clarity don't count for shit in my book. It's like lining the dash of your car with every flash piece of technology known to man only to remove the steering wheel to make room for it all - better in nearly every way, but at the same time completely useless. Can't see the appeal of the new cut.
Not worried though, the raw power of the first demo'll be on the album version I'm sure. This is probably just some old throwaway mix they leaked out to muster up a bit of buzz ahead of the release. Nothing to lose if the song's already out there, yeah? Better be anyway, I'm not willing to contemplate the idea that this is an indication of the album's sound.