That one was a reissue of the original GameCube controller with the original connector and everything. It works on the original GameCube and Wii and with the USB adapter that was released with it, you can use it or any other GameCube controller on the WiiU, Switch and maybe even Switch 2.

This new controller looks like a GameCube controller, but is something entirely new. It is a modern wireless controller that mimics the GameCube controller shape and button layout but won't work on the original GameCube, at least not without some additional adapter hardware