Good musicians steal- a familiar theme in a different genre

While working on a jazz arrangement of “Out of Nowhere” for a different class (ahem, Jazz Theory), I ran across this similarly titled piece by Acoustic Alchemy. Perhaps this is a long shot, but I think this is an arrangement of the same song. Here is a more traditional arrangement for comparison. The melody sounds very different, but the chord changes could be the same. Either this song follows a general ABAB’ trend, or it is actually the same song under a thick disguise. Thoughts?