mpeterson
Team THP for Life
I found a difference in over 1,000 RPMs of spin in the Bridgestone Tour B lineup between the four balls, using an 8 iron on GC Quad. You can ABSOLUTELY lower spin based on ball selection and it's a great way to better fit what works for you out there.
Funny - I actually just posted in the Saintnine U-Pro thread about something similar. I figured I'd mess around with some of the balls I had in the house and these were consistently spinning higher than my gamer ball on full iron swings - easily over 1K.