The degree of side scrubbing is not determined by the hitch as they all work the same. In my opinion, the two greatest factors are: 1. The distance from the pivoting rear wheels of the coach to the pivot point of the hitch, and, 2. the degree of castor designed into the toad.
The longer the distance between the coach pivot axel and the hitch pivot point, the longer the toad continues in the original direction and the sharper the path it takes when it is being pulled around the corner. As that path gets sharper and sharper, the faster and greater the toad front wheels have to turn to avoid scrubbing. At some point the toad wheels will scrub. If the toad front end design has greater castor, the front wheels will turn quicker and easier.
My Brat has minimal castor and, while the wheels turn to follow, it does some side scrubbing as the wheels don't turn as quickly nor as much as is needed to avoid all scrubbing.