That's really odd, because I thought Fedora would have better drivers.

Apparently, the settings would be the next place to look for answers. My settings are really boring and conservative.
When laptop lid is closed: sleep
Nothing special there, so I really don't know what makes this hardware+software+settings combination unique. I have another computer I use for tinkering, and this one is specifically meant to be the boring one, hence Debian. Turns out, that somehow resulted in amazing stand by time, and I don't even know how.