For me, it depends on the subject. For human subjects, I prefer the Nikon AF-D's rendering, and don't find the modern Otus-grade Zeisses all that appealing.
For landscape, it's mostly the opposite: I still don't like Otii all that much, but I love the Nikon 24 PC-E and the old C/Y Zeiss 2.8/85. The wide Zeisses like the 2/35 and 2/25 are also beautiful. I had a chance to use a friend's Hassy Zeiss 250/5.6 Super Achromat in C form (I think: it had the moving DOF claws), adapted to the D810, and loved the rendering of that lens for landscape, though I had no idea how to use that focal length well. The old Voigtlander 180/4 APO Lanthar is also beautiful.
I recently shot some available light stuff of people in a theater, and by far my favorite lenses were the 85/1.8D and to a lesser extent the 50/1.4D. I also shot with a 55 Otus and a 135 APO, and though they were relatively flawless, their results were not as appealing as the old Nikkors'. The 58/1.4G is very nice too, especially in the f/2.8-4 range where it has a nice balance of flavor and image quality.
Obviously, the quality of your photos is going to be entirely dominated by your skill and eye and a bunch other technical factors beyond the lens, but comparing my own work against itself with different lenses, I think the differences are meaningful within the context of my own work. Comparing two different photographers and trying to ascibe special qualities to the lens? Forget it: you have to do your own tests and comparisons.