I have just posted a reply in [GUIDE] Linux battery life tuning.
So far, my battery life is worse with my Ryzen 5 7640U than with my i5-1135G7.
Especially in FHD video playback, I’m looking at 4-5h instead of 5-6h.
At the moment, I hope it’s some sort of driver thing on Linux and that it will get better.
Mostly, because it does not correlate with the overall observations of significantly better battery life.