Is there a particular reason you'd go for the PNG version over the PDF version? It's a more suitable format for these "cheat sheet" type pages, since it'll use

Is there a particular reason you'd go for the PNG version over the PDF version? It's a more suitable format for these "cheat sheet" type pages, since it'll use the platform text rendering, and also keep the vector information (meaning it'll print better if you want to hang it up next to your desk).