I remember in 1975-6 when Grady Matthews opened up his pool room in Colorado Springs.
About a yr in Black Bart/Bob Osborne showed up to play some 9 ball sets with Grady.
He pulled out this red circle cue ball (1st time I ever saw it), and gurgling Grady said ''no way''!
He was used to playing with the Blue Circle Cue Ball that came with the Centennial Set, a ball designed to ''churn'' into a 14.1 stack/break shot with lots of 12 o'clock high cue ball spin.
That Blue Circle ball was heavier than the Belgium red circle cue ball and was a great cue ball for 14.1.
Now, the red circle cb allows a player with a great draw stroke to cut a ball in at a 30 degree ish/angel & come back up table, allowing the shooter two ways to get shape on the next ball, follow/draw.
The blue circle/stock Centennial cb in a similar situation would only allow the shooter to go forward because of it's weight.
Bob then offered Grady a game on the wire to 11 for $1,000 a set with this cue ball, Matthews declined.