[Red in Blue PA]

A distinction with little difference.

[xrmusn]

Sort of reminiscent of August Busch being told if he named the stadium in St Louis “BUDWIESER STADIUM” that MLB would not allow him to play in it- for their games.

Being a true entrepreneur, Augie said Ok, I will name it after myself - BUSCH Stadium.... FINE....

Then he went out and ‘invented’ a new beer, BUSCH.

Like he says, more than one way to ‘skin a cat’.

[Cboldt]

I agree, in this case it doesn't make much difference. But a short phrase like "super sunday" is more or less impossible to copyright, and anybody who uses that term (without knowing of the NFL's use) isn't copying.

Trademark, OTOH, is limited in scope to a range of products, in this case a sports/entertainment presentation. Trademark -requires- protection by its owner, or the right to exclude others from using the mark is lost. See "aspirin" for example.

Copyright also has a limited life. Trademark lasts as long as its owner protects it.