I wish I could help with the numbers aspect, but as far as the machines go I dont trust them. I feel that you should hit the clubs outside to truly see what your ball is doing. I recently bought irons and the machine had me hitting my 9 iron 170 yards. I never have and never will hit a 9 iron that far, I usually hit my 9 about 20 yards short of that. When purchasing my driver this year, I demoed a variety of drivers at my club's range without a machine. I chose my club based purely on performance, and have no regrets (I shaved 3 strokes since changing drivers). So my advice would be to hit the clubs outside and see how the ball flies, and which club you can hit the most consistently and feel most comfortable with. The guys with the machines swear by them, but what good are spin rates and launch angles if you cant hit your clubs on the course.
PS I love my G15