Don, Mike, and Ron, your grapple tests on grubbing up youpon are pretty specific. I'm thinking a complete test would be how easily you can pick up a log or felled tree with a stump. In most cases, you'll find yourself in the woods without a lot of maneuver room. Though both grapple types can grasp the center of the trunk, you may have serious problems moving the tree out of the woods because you are wider than most spacing between trees.
By grabbing the end of the tree or stump end and dragging, you can maneuver through the woods to get to an open space. Of course, you can buck the tree into manageable lengths and get it out, but a bucket grapple can be slid under the tree's end and the jaws closed down to allow you to end skid the tree to a clear area. Clearly, the best grapple depends on the job. Buying for the 80% use is a wise decision.
Just the ramblings of an old man with no hair. . . who has no need for shampoo, a comb, or brush.