That the use of the apron as a badge is more ancient than these is a provable fact. In averring that it is more honorable, the premise "when worthily worn" is understood. The apron is "more honorable than the Star and Garter" when all that it teaches is exemplified in the life of the wearer.
Recommended reading (pdf e-books):
Aleister Crowley - The Star And The GarterHelene Adeline Guerber - Myths Of The Norsemen From The Eddas And Sagas