Read reviews of this analysis, and search the web, Nikon DxOLabs favors. Not me, says many people, just look in google. And no one in the world to see the results of this house, just put a number, any sample image, and explain how they obtained the result of that test through the images. Result is a completely opaque, and put consumer cameras above the best professionals, gentlemen, this is completely unbelievable and untrue.
Is it better a Nikon D800 for landscapes that a Phase One IQ180 Digital Back? The answer is NO, no way.
Is it better a Nikon D5100 a 5DmarkII for landscapes? The answer is NO.
And for portraits, are matched? NOT.
Is the Nikon D800 ISO performance better than 5DMarkIII? It is also false, in fact the Nikon is worth to cover sporting events, I know professionals who have confirmed.
I could go on with a long list of scores that are out of logic but I have work, each buy what you want.
P.S. Forgive the possible lack of writing, use a translator.