Thx for the input. I did the range test anyway. Heh, wasted one of my expensive balls with all those shots. I loaded and reloaded #1 OCSA to get only side winds. All shots were in the fairway, which I note doesn't seem to affect spin that much. You know how they run on that course in practice mode. For the heck of it I launched my better ball at the green - bit and stuck. I didn't make enough shots to have all perfect shots, but I didn't use any awful ones either.
Anyway, the ball in question is the WGT Tour SD which has 2/5 spin as well as 2/5 distance. I averaged 4 decent shots with each ball. First will be listed the club, followed by the generic ball average, then the SD average, and finally the %.
D 260, 260, 0%
3W 241, 239, 1% So it seems the advantage is negligible with longer clubs.
3H 209, 217, 4%
3i 186, 193, 4%
4i 178,187, 5%
5i 167,174, 4%
6i 156,162, 4%
7i 140, 149, 6% (probable aberration)
8i 130, 135, 4%
9i 109, 113, 4%
PW 89, 94, 5%
So, I guess I'll kind of count on about 4%, unless hitting into greens.
Hope this is of help to at least a few folk.