Neither; the title is just a play off Ender's Shadow, the idea being "here's the same story from a different perspective". It...well, I'm not likely to write it as fic myself, but it would probably work, wouldn't it? Much like Natural Born Killers (which I haven't seen).

There must be other works of fiction in which we slowly realize that the protagonist with whom we've been identifying might be on the wrong side of things, but none come to mind. (A couple of interactive fiction games do, though one isn't really an example and the other is...excellent but not something I'd recommend.)