If she is buying at B&H Photo, she can ask this question right at the counter. B&H is one of the best photo stores in New York and their advice is almost always good.
Lots of years ago, I took the advice of one of their counter guys on a used lens for my Nikon FG (film) camera... it was a brand I'd never seen nor heard of, Kiron. He said it was good. Five years later, it began appearing on "cult classic" lens lists -- it's superb.
BUT, if she is buying at, for example, 47th St Photo, or any of the other hole-in-the-wall New York discount places, I'd strongly recommend buying only the Kodak.
Just my opinion.