Shoryudo Highway Bus Ticket

We plan on purchasing 3-day pass Takayama to travel between Kanazawa - Shirakawago - Takayama.
Would appreciate some clarification on how it works.

1. Is the route the same as for travelling between these locations without this Ticket. Is there only one route between Takayama, Shirakawago & Kanazawa or are there several? ie. are travel distances the same when using Shoryudo Ticket.

2. How does this Ticket work in conjunction with booking Nohi Bus?

If we purchase two of these tickets online outside of Japan, will I receive a voucher in the mail that I exchange in either Kanazawa or Takayama? And I still need to book Nohi tickets for bus departure times?

Many thanks.

Fully explained here:
https://www.japan-guide.com/e/e2357_shoryudo.html

For booking the buses, you can refer to the website of Nohi Bus Company as below:
https://www.nouhibus.co.jp/highwaybus/nagoya_en/

As it is shown on the website, you can call them for booking the buses even if you are Shoryudo Pass holder.