> HN's moderation is run by HN
No, it's run by a few humans.
> The rules are applied consistently
Yes, because those humans are awesome and consistent.
> because there are are no third party mods or rules.
That's not why reddit is different. It's because a lot of the humans that run the subreddits are inconsistent.
But some run their subreddits just like HN.
If you think of HN as a well run subreddit it makes more sense.