Badge engineering such as Black Horse / Graupner with price differences only motivated by brand names is quite common.

One good example is in cars. In Europe Toyota, Citroen and Peugeot has developed a common car known named Aygo, C1 and 107 respectively.
The cars are very much alike with the exception of some trim details and are all built in the same factory in the Czech Republic.

In Sweden where I live the Toyota costs $15,370, the Citroen $14,540 and the Peugeot $13,710.
Goes figure...