This review is between the Nikon version of the 35mm f/1.4 lens and the Sigma Art f/1.4
There's ups and downs in both with one of the biggest differences being the price! Nikon comes in at double the price of Sigma. However the sharpness is better on the Sigma. But sharpness isn't everything and Nikon battles back with notably better noise handling. The battle goes back and forth with ups and downs on both sides!