How does it handle better, exactly?

You can write simple http server or rest client with stdlib in Go. No need to include tokio, serde and hundred other cargos which constantly break things. I have apps written in Go more than a decade ago work the same now with recent version of Go. Where as, I had issues with getting few year old github apps in rust compiling and working in rust.

I know what you mean about Go vs. Rust here and I've seen it firsthand, though I believe the effect is overblown. I was able to modernize a fairly old project in literal 15 minutes by using Cargo Clippy's fix mode + a few small hand-crafted changes.

To me a rich stdlib is not a selling point. Both ecosystems have a ton of very high-quality libraries.