Ummm... All wings are critical, that is, they eventually reach Mcrit. In older design wings, drag rise was pretty fast after Mcrit. The Super Critical wing went one stage further in development in (1) dalaying Mcrit further than before, and/or (2) creating a High Speed drag polar (i.e. Wave Drag) which rose much more slowly beyond Mcrit, giving a much wider speed availabliity above Mcrit with minimal drag rise.
I'm no historian, but I believe that the A300 had the first "Super Critical" wing in commercial production. If you want, you could call the B777 possessive of a Super Super Critical Wing because the technology went one stage further with cambered trailing edges, not apparent on the original 'flat top' super critical wings.
Regards,
Old Smokey