I was idly browsing Frisbee equipment with a view to persuading an acquaintance in the local school sports hierarchy to start an Ultimate league going, when I noticed that there are different kinds of discs for Frisbee Golf -
Putt & Approach
Yet, in the catalogue descriptions, they are all the same size, and all the same weight.
What is the actual difference between these discs? Or is it just a scam to make you buy more discs?