Freedom fighters fight for freedom. Fire fighters fight against fire. I want to write an article comparing people who fight for freedom versus people who fight against freedom. Would "Freedom fighters vs Freedom fighters" be a wrong title ?
Perhaps an alternative would be to refer to the action rather than the people:
Freedom fighting vs. Fighting freedom
This has the advantage (perhaps disadvantage if your intention is to force people to start reading the article) that it can probably be interpreted correctly on its own, whereas "Freedom fighters vs. Freedom fighters" is snappy but has no clear meaning*. It also retains some of the snappiness (at least, balance and alliteration) of the original. Unfortunately, freedom fighting sounds a little odd to me, so I don't find my suggestion entirely satisfactory.
* Without context I would interpret it as being an article about in-fighting within the
rebel alliance freedom fighters' group.
Very well written. A title that will catch the eye. If however, you are looking for alternatives:
Freedom Fighter vs. Freedom Buckers
Buckers meaning : Informal : To resist or oppose obstinately; object strongly: i.e. The mayor bucked at the school board's suggestion.
Just another suggestion:
Freedom Fighter vs. Liberty Terminators.