Hi TimothyO -
Yup. I've done the same experiment twice now, one with a matched set of PDs about a year ago, then again about 2 months ago with two P1s. I have come to the very same conclusion. It's not even close, Gut/Poly wins the spin contest by a wide margin.
(9) Donnay Pro One, 16x19 | 12.4oz, -12Pts, ~330sw
Mains: Babolat Tonic Gut, X's: Red WC Mosquito Bite | 54/50 lbs.