Moderators on Reddit can be biased in different areas, they might let a comment pass or have a nervous breakdown over something they don't like. It's not clear and never will be but you still have the freedom.
Facebook algorithm does not miss. It does not overlook things or understand context. All it knows is someone said something they're not supposed to and that is the difference.
I'll take Reddit over Facebook anytime of the day because at least on Reddit, I can say controversial things (if any) on my own feed without the fear of the algorithm deleting it and banning me for a month where I have no voice, only a threat to be confirming to Facebook ideals that I have no idea what they are.
So yeah, both are censuring but Reddit allows more freedom.
I do condemn censorship in all forms (unless specific laws are being followed) but after fighting against all the platforms for a voice, I see Reddit as the best option for civil discourse. Hackernews is also very close to reddit and we know the model works very well.
Wherever I am, I'm always looking for good discussions (like this thread for example) and I'm glad that I can do it more freely on Reddit and HN than I ever could on Twitter or Facebook, hence my comments.