Okay, BMW had M and M Sport.
Lexus has F and F Sport.
Cadillac has V and V Sport.
Mercedes-Benz has AMG and AMG Sport.
Audi has S and S Line.
1) The word “sport” now looks weird.
2) At some point these are just going to seem like arbitrary letters that may or may not be accompanied by the word “sport” (“line” omitted).