I saw 3 winches by the same maker, all 8000lbs. but with different hp motors (1.8hp, 4.8hp, and 5.5hp). How can they all pull the same load with such a drastic variance in power? Would the 1.8hp motor only be able to pull 8000lbs. on a flat surface while the 5.5 could pull 8000lbs. up a hill or out of the mud? I am thinking about getting a small winch (3000lbs. w/5.5hp motor), but for $50 more I could buy a 8000lbs. winch with a 1.8hp motor. Would that be better? I don't do any serious offroading but want it for moving stuff (large trees, rocks, etc.) around and occasionally pulling someone out of the snow.