These car analogies leave me dizzy. But suffice it to say that an [IQ140 + DF + Schneider LS lens] and a (rumored) [Nikon D800 kit] simply do not overlap much regarding features, extensibility, flexibility, advantages, disadvantages, design emphasis, ideal uses, intended markets, distribution/support/service methods, marketing, or really - much of anything other than they both take pictures and are both high-resolution.
Resolution is the most often sighted spec in digital photography but is often one of the less important aspects, especially when it comes to pricing. A Canon 5D Mark II, a Mamiya ZD, a Phase One P25+, and a iPhone 3g running a stitching app are all 22mp cameras but otherwise share very little in common with each other.