The green coloured boot on the left is a retail version that was sold for the the piblic in 2013. On the right side we got a bit more interesting pair of boots, they are called “Sample” or “Salesman Sample”. They were usually a tryout boot, property of Nike, or then just given to shops for exhibition purposes and were not ment to be sold. But as we know some pairs got away to the public 😉
The difference on my pair of “Sample’s” is the fact that they got a carbon-fiber Sg-Pro soleplate. The ones that were made for public releases had a fiberglass soleplate. Perform wise there is not a big different, but carbon-fiber is slightly stronger than fiberglass. And ofcourse the carbon fiber looks better.