Hello,
The difference between the electric and PTO, is quite simple. The electric commercial winch is rated by pulling a rated, rolling load(12K, ect.) up a 45 deg. ramp, whereas the PTO is rated to pull the rated line pull(10k ect). directly. Thats the reason the 12k electric has a 3/8" line and the PTO has a 1/2" line. I have a neighbor who uses 10k garwoods for logging and uses a grade 8 bolt for the shear pin, he estimates that he regularly pulls 40k logs with the truck. He has replaced his winch several times due to spliting the case, where the worm fits to the gear, I have seen a pulled apart case and its impressive. Vast difference between commercial and PTO military!
eric