Pretty sure WW, certainly US - I don't expect these to be ultra rare or anything but I'm fairly sure it'll be a limited run.
I have the console but never used the controller which is why I'm buying one, I don't mind the minor difference...TBH I would have liked Sony to release a 20th anniversary PS4 that was not numbered and maybe lacked the 'premium' finish of the numbered console (things like the paint finish not having the PS symbols 'engraved' like the touchpad difference on this) - still, at least this controller means everyone can get in on the anniversary if they want