I think the economy of scale accounts for the price difference between workstations and arrangers a lot more than the content. Workstations probably sell 100:1 compared to arrangers, and exist in a far more populated and competitive environment.

If you sell 100X more of a product, you can sell them cheaper. And if you have more competition, you NEED to sell them cheaper!

Certainly, content is a factor. But not THAT much...