another vote for Nikon 24 -120 very useful range.
vignettes and distortion can be easily and automatically corrected in lightroom
what other lenses do you have ?
70mm is a big short for portraiture; so if you do not have something like a 70 -200; I would go for the Nikon
The one or the other of the lenses in question will be complimenting a lens set up of a 50, and a 16-35 and in the future a 70-200. Basically a gap filler between the 16-35 and the future ownership of a 70-200. So I'm not entirely worried about the extra length of the nikon, because it will eventually get covered in my lens set up. But in the time between now and the glorious day i become a 70-200 owner the 120mm will be nice, but not entirely necessary.
I'm not sure if either lens would take advantage of the "E" below F/8 so I'm not sure it would make much difference between the two.
This lens is not intended to be taking full advantage of the resolution power here, for a portrait lens I intend to use higher apertures to make it just a hair softer. For my work where I want absolute sharpness, I have the 50mm 1.8g for stuff like architecture and still lifes, and the 16-35 for landscapes.