Because, while in fact neither is a "free-speech" platform, Parler brands itself as one while Twitter does not, and the person who posted this article has an ax

Because, while in fact neither is a "free-speech" platform, Parler brands itself as one while Twitter does not, and the person who posted this article has an axe to grind (adding "free speech" to the title when it isn't in the headline of the article).