I don't know if all of this corresponds to the info that has been available through this site. But here are some pics.
Twin turbo only (not three for better throttle response) and 0-62 in 4.4 seconds for you straight line folks (compared to the power to acceleration thread on here). 420/400 at 3300 lbs equals 4.4 seconds? Other stuff included are that the mstripe on the roof is an available option, grills will be dark silver vs. black on the prototype, lighter than the 428/435, carbon fiber lip on prototype will not be in carbon fiber, diffuser is only for the prototype, and some more. There were no comments on those nice exhaust tips though!
I'm curious as to what their sources are at Automobile magazine.
Twin turbo and 4.4 second part.
3300 lbs mention.
Cheers.