Dope! thanks.
I'm with 3stooges, sounds like a slowed down (tape) earlier version of the OG.
This should sound less off:
http://www.fileswap.com/dl/yo4hILRKr1/
I just pitched it up 2 semitones, so tempo goes up as well.
Not there 100%, would have to do proper A/B to get vocal tuning closer to the OG / album version.
Sounds like it has Billy Squire 'The Stroke' (as sampled on Eminem 'Berzerk') drums mixed in towards the end.