The difference is that here I've been able to see many opinions expressed and given a fair shake which would've resulted in a ban on most of Reddit. The title moderation also helps with keeping them neutral and/or informative (biased titles set the tone of the conversation).
The tone policing is far stricter, but the actual content policing is a lot less absurd. The result is that controversial topics and opinions don't result in as much of a toxic cesspool of name calling. On top of all that, here you can enable the display of deleted and flagged comments.
I think that thinking of HN as anything close to being free speech though is a really wrong take. Sure it’s less leftist biased which is nice, but for example the title changes aren’t just to reduce controversy, they consistently favor the in-group. If you believed the HN homepage and comment section as anything close to the zeitgeist you’d be doing yourself a disservice.
It's more free-speech than Reddit along the political spectrum, but less free-speech than Reddit along other spectrums. We're not allowed to insult each other on this site, for example, and posts that are specifically about politics are not allowed. Even Reddit has subs for different political groups.
The tone policing is far stricter, but the actual content policing is a lot less absurd. The result is that controversial topics and opinions don't result in as much of a toxic cesspool of name calling. On top of all that, here you can enable the display of deleted and flagged comments.