Shouldn't my 5Ds produce sharper images?

Both images were shot with my Otus. Then I cropped to a small section of the frame, exported at 1:1 as TIFF, sized UP the 6D image, and saved as PNG.

One image was taken with my 6D, the other with my 5Ds.

Shouldn't the 5Ds image be sharper than this?

http://idealportraits.​com/share/crop2.png
http://idealportraits.​com/share/crop1.png

They both look pretty sharp to me, though the fist looks ever so slightly sharper.
Could be a slight depth of feild/focus issue. In the light and distance you are shooting, it would be easy to get less than perfect focus.

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With that type of subject matter, it is tough to tell, because we don't know how "sharp" the numbers and letters are printed on to that surface in real life. . If the actual, real life numbers do not have very sharply defined edges, then a perfectly sharp photo would not look perfectly sharp.

These type of high-resolution close-up images reveal any softness or flaws in the printed medium that you are photographing, so without having the real life object (TV remote) and a magnifying glass to examine and compare with your images, there's no way to tell if the photos are perfectly sharp or not.

Perhaps another type of subject matter would be more suitable for this type of test. . Something that is not manmade, or if it is manmade, then at least something that doesn't involve printed text. . Very close up shots of fabric such as canvas may be better for evaluating image quality.

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