What’s confusing is where the other shoes fall in the spectrum. It’s as if Nike’s marketing department fell in love with this “Free” concept and decided to create a bunch of new shoes with the title Nike Free while abandoning the barefoot scale they created.
You can check out a the official Nike Free running page. They have an interactive tool that allows you to “Explore the Nike Free Family.”
The only problem is that this tool only shows you 3 Nike Free shoes. And as we learned there are quite a few more Nike Free shoes than 3. As a rule of thumb I would place the training shoes in the upper 8.0 to 9.0 on Nike’s barefoot scale. So if you are truly looking for a barefoot running shoe/experience I would stick with the Nike 3.0′s or 5.0′s. However, like I said I’ve read pretty good reviews for all their shoes.
Hope this helped! It took me a while to figure all this out.