Once again be very careful! I know for a fact that the simulators in the PGA Superstores read spin at about 800 to 1000rpms higher than it actually is.
Approximately how much difference in driver spin is there between the typical balls at a range/superstore vs. the balls we would play with on the course - say a pro-v 1?
I've heard that the range ball could be around 500rpms higher. That plus a simulator that's off by 800-1000rpms would be a huge difference!