After a little research, I'm pretty sure those tables did not have the pro rails. Gotta be lots of people around that have played on them. Several members here have posted on them in the past. Are you considering modifying a table or preparing for a tournament?
Also look in the table difficulty stickie and the top of main page. And pro cut do give you a larger shelf. Most bars and tourneys will use standard cut ridge back rails. Helps tournament move faster and in bars people like to make balls not get rejected.
Tightening up the pockets without modifying the shelf always gives you a shallower shelf. Its simple geometry.
The Pro ridgebacks are both longer and thicker, hence deeper shelf. I have not played on them, info on their site.
Thanks guys!
I did quite a bit of reading on them, but could not find an actual statement comparing them.
Im in a situation where I might be sticking a valley in a garage in a few months, and sometime later upgrade to something else maybe.
I have a line on an 8' valley thats got some type of aftermarket rails and simonis on it for a good price. SO might end up just sticking with that if it can be made to play closer to a diamond than a valley.