In fact, it adds two buttons to the Xbox Series, and can use macro programming and other adjustment functions, so it matches the elite controller in marketing, and is actually an Xbox Series controller.
Still on this, what is an Elite Pro Controller? The official name for the Elite Controller is Xbox Elite / Elite Series / Xbox One Elite. I can't find Microsoft's Elite controller with "Pro" on the name. Is this a regional thing and it's called Pro in other countries?
Word of warning, one must be careful when claiming comparisons. The Elite Controller has other features like the tension adjustable analogs, magnetic replaceable analog + d-pad caps, trigger locks, profile settings, 4 buttons/paddles on the back (and maybe other things I'm not aware). The Superpack improves on the Xbox Series controller, but the Elite has other features that are not matched.