I'm gonna be the cool non-conformist rebel and vote for "interpretation." I think it's a topic that's come up quite a bit lately, and I think guidelines on the different ways to interpret the original song would be helpful to put in the site FAQ, or something like that.
It's a simple tutorial to write, and you could probably just put in a few hours and cover at least the basics: covers, remixes, and arrangements. Arrangements being the thing OCR accepts of course. It'd also be nice to showcase prime examples of all 3 [say, a Minibosses song, a DJ Seith remix, and... one of your OC Remixes, respectively].