I assume the poundage is force required to break whatever was tested free after using the listed product? I don't have numbers, but I know we used wd-40 and liquid wrench a lot before finding PB Blaster, and no one who ever worked here thought either one came close to PB. Can't speak for Kroil, and I would think the ATF-Acetone mix a disaster waiting to explode.
Biggest thing we found with PB when we discovered it back around '97 was that it would keep penetrating. Things we'd soak with the other two repeatedly never seemed to get any better after maybe a day. With PB if it wasn't easy, we'd spray again and let it sit overnight (when possible) and it was amazing.