I've been using CutePDF since it was suggested and like it. The reason I asked the original question is that I'd been using SnagIt. SnagIt rasterizes everything. Obviously, this is undesirable when it comes to drawings.
Thanks, mcgyvr. The main thing I'm looking for is that a drawing converted to a PDF remain a vector image. But I figured that there were other differences that might not be obvious from a web page.