Yes, there are variations in the teeth in the one-off handmade combination screw driver shown below (topmost of two), most notably in the height of the teeth.
The idea of combining the alligator wrench with a screwdriver was a popular one 115 years ago. The little Roebling wrench, the Teddy Screwdriver, and the handmade tool all make this point.
Does any American manufacturer offer this combination today?