Mark is quite impressive, but I don't listen to his music that much. I do love Sultans of Swing. I would have to say Lindsey's breathy, sexy voice is WAY better to my ears than Mark, but that's all about opinion.
Don't forget that Mark also scored The Princess Bride, excellent movie and excellent soundtrack!! (BTW, I can play part of the theme on my guitar!! WOOHOO!
) I PREFER Lindsey as a singer AND as a guitarist, but Mark is great.