It might have to do with the way he recorded them in his home videos. On stage he has a lot of effects in the chain. But when he played that F-46 he also played the DD-6MCE, so it was somehow the same setup, and that one has a much better sound to me. I heard him playing the rosewood version DD-6RCE at NAMM 2013 and that was even better I thought!to be fair, most of DD's acoustics sound thin. i think it is more about the finger picking and coolness than the tone for him.