Scratch that... it's similar... but it's still an arrange...
ar·range·ment [uh-reynj-muhnt]
–noun
6.Music .
a. the adaptation of a composition to voices or instruments, or to a new purpose.
b. a piece so adapted.
Before you start calling things that are arrangements not, kindly read the definition I just provided. Every single song on this entire website, by definition, is an arrangement. And yes, the source is highly prevalent. In fact, I think it might be one of the most source-faithful tracks on the album!