Is JavaScript web server performance just a marketing facade?

I'm looking at the referenced image from Deno's 2.0 launch and they claim they're faster than Bun (https://deno.com/blog/v2.0). on Bun's home page (bun.sh) They claim to be more than 2x faster than Deno, using an express server.

It's confusing to know who to trust. It looks like a marketing tactic without concern for end users.

Have you used both in production, how do they scale?

Have you benchmarked it and have a different result than what's marketed?

No it's not marketing facade