if the back wheels matched the wheel wells, i think that the silver car would look way better. it looks more like an NSX personally. but the mk2 and the nsx have been comparred w/ farraris and other mid engined cars all the time. that car w/ twin turbo's and all wheel drive would have rocked alot of cars of its time, even still today. could you imagine the handling and the corner exiting speeds. its a mid engine skyline.
As far as the powertrain layout goes, it is a clone of the Ford RS200. That is a very good thing since the RS200 is one of the only Fords on Earth that I really, really like.
Pay particular attention to the prop shaft from the transfer case to the rear differential. That allows both axles to be centered in the car. Nissan could use the same strong conventional diffs that it already had. The engine and transmission were laid out longitudinally. That would (and did) allow the same system to be shared with a front engined coupe. More importantly, it allows the engine to be mounted further forward than if a Porsche-like transaxle had been used. Audi Quattro/Subaru symmetrical AWD systems need a short boxer engine or the end up with the motor really overhanging the end of the vehicle. On Nissan's MID4 II the rear axle could have been stretched a foot, if needed.