I usually use a baking sheet or parchment paper on top of my cookie sheets when I bake. I've used both in the past, but was wondering what is the difference? I've never noticed. Is one better than the other? Is one more expensive? Are there advantages for one over the other?

To me a "baking sheet" is the pan, as in "sheet pan." But anyway, I use Silpats because they are reusable for 3000 bakes, they store right on my baking sheets and they are non-stick.

Oops, sorry...now that I think about it I think the "baking sheet" I was talking about really is parchment paper, but it was labeled, "baking sheet," on the box. I think some companies label it as "baking sheet" and others label it as "parchment paper," but it is the same thing (or at least I think so). I do have a Silpat, but this is something different than from what I was originally talking about. Anyway...I guess I just answered my own question!