I don't know about sharpness, but the Zeiss almost certainly has better boke. It is also a much more expensive lens, so that is not really surprising. The Nikkor is pretty neat though. I could imagine owning both.
I'd love to see a comparison of all the the available 35mm f1.4 lenses, including the new Samyang...I might swap to another 35/1.4 lens if I knew there was a better one...Have to say those Zeiss pics are very impressive so i'm leaning that way at the moment