How often do you boot your system
I boot my system every few days. The fact that it takes 10 seconds longer for Fedora is not significant. I also have UBUNTU.
When all is running for graphical user interface, the response times are not significantly different. I cannot type as fast as a screen can change. So this evaluation has little meaining to me.
What is significant is how each software performs when acting under heavy load. That is, run a background job doing some I/O and some compute, and now measure foreground speed for such things as large file copy, or a set of compilations. And while the background is running, to then measure foreground response.
My evaluation is that after stabilization, both Ubuntu and Fedora are essentially offering the same performance for the same software (libreoffice as an example, or firefox, etc.)
Dont bother cutting hairs into four.