I'll start here without the comparison to the 24-70 Nikon and add that later with different images. Tech data shot with a D800E on tripod in live view and manual focus with Hoodman loupe. I am focused directly on the Duke sign and specifically on the C in chop. Now the left and right crops the curbing is about 6 inches shorter but if you see the tile meet the concrete on the bottom that really is the focus point on the left and right crops. Im really after here are my left and rights sides equal at a given aperture as I had issues with a older lens that had asymmetrical problems. But this new lens is looking really good if anything i would give a very slight advantage to the right side. I shot from 1.4 down to F11 and at F11 you start seeing diffraction. This is one sharp lens as you can see. I did use a standard sharpening of 225,.06,1 in C1. My outdoor landscape setting
Here it is at 5.6 the whole scene. As you will see in the crops 5.6 is amazing all around the frame.