With Gigabyte you can save your settings to a file and import, which I did, but I also checked all settings to confirm they were the same.I replied my previous PBO settings when I went from 126.96.36.199 to 188.8.131.52 I haven't noticed a drop.
my two best cores still hit 5.05Ghz with PBO+ 200
As for EDC i've always had it at 140 so that isn't an issue for me.
After seeing the huge loss on 184.108.40.206 I've actually tested all Agesas / BIOS between .3 and .7, and with every update there was a slight drop in performance, accumulating to 2-3% from .3 to .7
I have an Arctic AIO 280mm and well ventilated case, and I always test after a fresh reboot + 5 min of idle time. Ran the tests multiple times and results were consistent.
It all makes sense as the 2 BIOS with the heaviest impact on performance had micro code security fixes, which I don't care since my Windows is clean.
At the end of the day, I have a 5800X (overclocked + old agesa) that's faster than the 5800X3D (locked + newer agesa) according to cinebench and cpuz results on reddit.