Ok, spent the day with 1002 since i only got my OC stable with 0809 yesterday as per above. Z370-F
In short, for me its been the best bios so far. Was stable first go with the exact same settings applied FROM 0809, but using a lower voltage (1.28v max @ 4.8 non delid AIO vs 1.31v) and 7 -8 degrees cooler. Tested with IXTU, Realbench and Prime95v266 (small FFT). Doing Large FFT now and its a steady 64C.
I got weird unpredictable BSODs in 0809 but everything is better in 1002 so far. Zero errors so far. I also happen to have an AIO and I have received zero low-speed warnings but the speed is reported via USB so it's not that weird.