Stupid question, but...are any of those compatible with Word? Guessing not, at least not if you're running track changes or making use of Word styles?
Most of those apps use Markdown, which is basically plain text. So any document in Markdown can easily be opened as a Word file or anything else. I also use a custom font and have heard that the page count gets messed up on Windows with it. The programs I use that aren't OS X-exclusive just don't perform as well on Windows. So while my uses may be simple, a Mac is by far the superior platform for me. I also use some add-on apps to my programs that are exclusive to OS X.