Newspeak was an intentional in-universe conlang designed and handed down by Ingsoc based on "how you speak affects how you think" (which is a hypothesis that has... some kind of name). This is a bunch of people trivially avoiding automated filtering like it's been done since the first puritan implemented the first world filter.
One of the main differences is that self-censoring seggs and raep and ahh-es or whatever still leaves it plenty obvious what you mean, it just outs you as a Tiktok user. Conceptually word filters are a blacklist whereas Newspeak was intended to be a whitelist with the restrictiveness that entails.
They don't.