I don't shoot fashion, but when I made my test for Kodak v. Fuji, what it boiled down for me was colour palette. The greens on the Fuji turned a little too turquoise for my taste (at least the way it was printed on the Frontier my lab uses).
Now that I print RA4 at home, I must say that paper choice is another important variable in palette. Fuji printed on Kodak paper looks pretty much Kodak-ish, but I haven't tried yet using Crystal Archive, which I will do eventually.
Get one roll of 160C and 160VC to compare, it's really a matter of taste, and a minimum investment that's really worth it. In terms of basic performance, you can be sure they're both great. If you can, rent or buy a Macbeth colour chart to balance them properly, and get a better sense of how they render colours. At the minimum, a gray card shot will help.