To me, it's just an example of the Streisand Effect in action. My first impression upon clicking this link was "Wow, this other game must be a lot better if they're censoring comparisons to it."
Reviews making comparison to similar games seems inevitable, and for a developer to signal that they won't tolerate such comparisons, to me, signals that the majority of the comparisons were likely unfavorable.
So rather than seeing reviews from random people telling me to try out a different game instead of this one, which I'd only see if I clicked on reviews, something that I don't really do that often, I instead got the developer telling me I should look elsewhere first, and they did it as part of their elevator pitch.
It's just not a great look, you know?