This item listed here is a duplicate and is not the same controller as the black one found at various stores.
This color was later added to the roster and now also comes in the form of this "Saturn Derby Stallion" - color, from the limited edition console often mistaken with the "This is cool" - version.
"This is cool" - 2.4GHz Saturn controller, based on the design of the "Saturn Skeleton" console.
"Black" - First and foremost the Bluetooth version of the aforementioned controller, but black, and also the USB version can be found in this.
And the blue ones that are 6 button controllers, instead of 3, are mega drive (mini) USB controllers, mostly atleast, and the controllers are produced in affiliation with Sega Corporation Ltd., not just officially licensed as is the case for all of the above. This is a collaborative set of premium products.