Openlitespeed vs Nginx benchmark (WordPress)

From GTMetrix tests I found on Reddit, Nginx with FastCGI cache is loading much faster than any website using Litespeed. And yet, there are many comments on forums claiming that OLS is much faster than Nginx and saying Nginx cannot scale high-traffic very well.

As my understanding, Nginx is used by nearly every high-traffic WP website like CNN, New York Times, and Buzzfeed. If Nginx is so bad at scaling high-traffic, why are these companies using it?

There are some discussions (not sure I should post them here) that strongly criticized Litespeed, saying that their company blog and several of their affiliate bloggers are purposefully sharing graphics of a speed test where FastCGI cache was disabled in the Nginx server, causing the results to be skewed in favor of OLS… if that is true, it makes more sense why GTMetrix shows Nginx servers being faster.

Even for non-WordPress, I found that aaPanel (control panel) speed tests concluded Nginx was faster than OLS too.

I mean nobody cares about a few milliseconds difference but Litespeed is saying things like Nginx is 15x slower than Litespeed and very dramatic statements like that…

Is this some desperate marketing campaign with smoke-and-mirrors?