The poll is closed. Final results: 40 people voted the 7' Diamond, 15 people voted the 9' GC. 72.7% to 27.3%.
The reason I started this poll had nothing to do with Brunswick vs Diamond. It was the table difficulty factor. IMO, it gives too much weight to the pocket compared to the bed size of the table. It rates these two tables almost exactly the same, as seen below.
View attachment 799519
IMO, and I'd put money behind my opinion if a group of players actually went to both tables for a day each... I'd bet all levels of players from beginner to pro would have significantly better results on a 7' Diamond compared to a 9' GC, on any type of skill based assessment. Whether it's making a spot shot, playing the 9 ball ghost, playing the 4 ball carnival game, doing some sort of repetitive drills from a drill book, straight pool high runs, etc.
There "may" be a discrepancy on playing the 8 ball ghost, but I'd still bet its easier on a 7' Diamond. The other ones would be a total lock.