Same with almost all originals back in the 50s. The cover was always inferior.
But Dylan may have done Gospel Plow better than Mahalia. A rarity!
The cover was usually inferior, but not always. I like the Four Chaps' version of Roll Over Beethoven, which is on my original list, much better than the original. Same with Pat Boone's version of Tutti Frutti. Of course, Boone's versions are always superior because he's the King of Rock and Roll (and he's still rocking).