Love them both, but (JMO here) Castellucci’s “16 Tons is better than Ford’s. Ford’s “Shenandoah” is better than Castellucci’s. I could listen to both every day and never get tired of either one. Castellucci has the benefit of modern technology, so he’s got an edge in showmanship. Check out “Folsom Prison Blues” or “Oogie Boogie’s Song.” Overall, though, Ford’s voice would be my desert island pick.