Would anyone be able to weigh in on the relative playing characteristics between Wilson K-Gut and Wilson K-Gut Pro? Yes, I've read comments about price (e.g. "for a little more, get gut"), but I'm really interested in reading any feedback about either of these strings; especially how they'd "play" in a stiff, heavy K-Factor Six-One 95 16x18 frame. I know there was a thread not too long ago about "K-Gut" but I've been using the "Search" function looking for it--with no such luck. ANY "K-Gut" feedback would be greatly appreciated. Thanks in advance!