The Eagles Club that I belong to has four 9' Olhausens. The "proper" pool room across town has ten 9' Diamonds. At a quick glance, the pocket sizes seems similar, tho most folks feel the Diamond are "tighter", and in all fairness they are pretty close. The depth of the shelf on the Olhausens make them play a lot differently, and it's quite comical to see players who only come to our club once or twice a year shake their heads when balls rattle on our tables.
Let alone the folks who play at the family entertainment center nearby, on 9' Brunswicks that are much more forgiving.
This is APA-league level stuff, so bear that in mind, of course. It still is funny, to me.