that is the poor choice in pickup/amplification/effects and not the ideal strings im sure, for that particular guitar, not to mention the $hitty recording, making it sound so awful. Even I could make an M-20 sound much, much better than that. he is doing it all wrong. or for what hes going for, use a spruce top or guitar or something else (maybe a strat!)
I have found my mahogany top Guilds to be in a world of their own, soundwise. that might make them a one trick pony, but they sure sound sweet. actually a 2 trick pony because they sound really good for slide, and I am typically not good at playing the slide. mahogany top not better or worse than spruce, but definitely different. I play the short scale M-20 (1960s) and the long scale, flat/solid back, mahogany top D-25 (early 70s). The F-20s also sound really nice. i have a short scale one, and sold a long scale one I had, which sounded so much like a regular dread (which is to say quite good!), that i just didn't need it. The mahogany guitars sound nothing like the F-20s.