Imo she does not look the least like Kurt, although I can see how some people might think so by comparing the photos above. But when I watch her in a movie, I certainly don't sit there and think "wow, she looks like Kurt Cobain".
More importantly, the girl has a wonderful voice. The first time I saw her was in "Elf" and I fell in love with her singing right away. I'm a big fan of She & Him.