You high likely remember that on Gamescon 2017 and the E3 2017, Microsoft made a limited edition Controller that you could make in their DesignLab!
On the E3, 1000 controllers where made. and the Gamescom 3000!
Below is a side-by-side comparison of the controller itself. Both first numbers had the same colors!
There are no differences on the controller other then " Made at E3 2017" and " Gamescom 2017"
According to one of the Microsoft Designers, the lower numbers will be auctioned for charity in the future!