Oh I honestly can't say that Linux is "better" than say, Vista, especially when you appeal to specific platform applications. AutoHotkey is one. There are a dozen apps that can reproduce GUI scripts and hotkeys in Linux (Ubuntu has one built-in), but not hotstrings, for precisely the reason mentioned Gothi[c] mentioned — Windows API calls. Mac users dream of AutoHotkey, too.
that's like arguing that if i had written autohotkey for AmigaOS, AmigaOS would be automatically the superior OS.
If you start to appeal to "specific platform applications" you can always argue that A<B ;-)
If that app really is that crucial to you, then, for whoever sake, stay with OS-whatever, but please don't argue that the OS (that, if i really want to argue about the term "OS", has nothing to do with some user-space tool) is better because of that.
this works (of course) in both directions.
i just think your argumentation technique is flawed.