6D + 17TSE vs D800 + 14-24 + PS6 pc

One of the two has to be the ultimate architectural set up, short of a view camera with a lot of film and a lot of time.  After the loss of pixels to software based correction, would the D800 yield a better or worse image than the 6D with the lens based correction, assuming a large correction is required?  Many buildings are so close to obstructions that you would have to lose half or more of your pixels at the top of the image to correct the perspective.

If that's the only consideration, the 36 mp of the D800 would easily equal or better the 6D with the 17, but there could be other degrading factors in the software.

Would there be any visible problems with a small amount of correction in PS6?

With one or two more FF lenses, the difference in body prices is 12-18%, so the two compete heads up on price, although the reliability and service factors remain in my mind.

Thank you in advance for your answers and opinions.

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Ed Rizk