The harder sound of Disturbed fits the message of Land of confusion. Gives it even more sense of urgency:
This sounds completely different from the original, but it has a nice groovy chill vibe (do remixes count?)
Graceland by Paul Simon is of course a legendary album, but I think I prefer this Gui Boratto remix of That was your Mother:
Might not be everyone's cup of tea, but it does fit the description of being both original and a duplication.
When I was still a teenager I liked trance and dance music. DJ Tiësto made this cover of Adagio for strings.
Only later I found out melodies from several of his songs were based on (famous) classical pieces, like this one from Barber.
So, a 'house' DJ introduced me to classical music.
(I would now prefer a more classical version, like Hauser. But that is not really unique in it's own way, while being a nice rendition.)