The ARWD is a silver five inch reflector and it has a shorter neck than the Standard one. That's why it sets further back from the flashtube and broadcasts a wider angle of coverage. This creates a wider broadcast of light within a one f-stop range with the first setting at a wide 80 degrees.
In the first setting it is about as wide as the wider setting of the normal reflector but then it goes to extra wide 95 degrees coverage when it drops back into its dual notches.