My understanding is that in the old days, 14.1 was played on much looser tables than this one. This 14.1 on diamonds is a creature of our time and I heard many players at the World 14.1 Championship complain that 14.1 wasn't meant to be played on tables like that.
Other old timers have told me the same thing.
I had a GCI for twenty years, sold it, bought a Diamond about 10 years ago. I can tell you that 14.1 on the Diamond is much more challenging. I am going to 760 to speed it up a bit. I now have 860 but find I have to hammer the balls apart, and given these pockets, accuracy goes out the window. It makes 14.1 play border on tedious.
_Rick