Here's something interesting about the R9 vs the R11. The shot on the right is a drive with the R11, 294 yards, no spin, blue tees, 4 wind at 1. The shot on the left is with the R9, same conditions (several restarts) and went 293. These are with the Tour-SD ball.
I originally thought I had the pictures backwards because of the difference in trajectories but by the looks of it the R9 is higher.