I have been experimenting with different versions of the Herzberg shape and I recently found an original for comparison. So I took some photos of how the Herzberg lines up with the Bell shaper and the Rieger #14.
I shaped onto some paper and held them together in the light to get and idea of the two shapes. The Herzberg is in green and the Bell is in red.
As far as I can tell the Bell H shape is an exact copy of a Herzberg shape without any differences.
The Rieger 14 shape is supposed to be the Rieger copy of the Herzberg shape. Here the Bell shape is in green and the Rieger in black. The blade of the Rieger is nearly exactly the same as the original Herzberg but the tube of the reed is narrower, the tube is straight with no flare. Part of the Herberg reed style is in the bevel, and the flare at the butt of the tube has a relationship with the tip opening. So the #14 is a very similar shape but will create reed with a different tip opening.
I know Fox make a few shapes that are similar to the Herzberg, their Michael Dicker shape is close to the Rieger #14 as well. If you want the Herzberg shape I would really suggest the Bell H shape which is an exact copy. The only advantage of an original Herzberg shaper would be the pin indents which precisely position the cane. And that would only be an advantage for people with a Herzberg profiler.