My distro is running vanilla-stable series with 6.0.12. How does a hardened kernel differ from a stable one?

5.4.0-135-generic

Probably Stable, I just use distro default (currenlty 5.15.*)

Arch’s core/linux

6.0.10-200.fc36.x86_64

I use the lastest stable from Manjaro, Just upgraded from 6.0 to 6.1

Whatever my distro ships by default

On what device?

Edit: I froze all my kernels at 4.20 for the lulz

Libre

6.0.12 vanilla-stable.

The last from my debian.