I've been comparing ToughGut/CoFocus to a ToughGut/WC Mosquito Bite setup. I think the TG/MB outperforms TG/CoF in terms of playability over time. In my dense, flexy racquet, strings take a long while to break, so I've logged plenty of hours on each. Both are very comfortable, but CoF became harder to control after a number of matches, while MB crosses maintain softness AND control over a very long span of time & matches.
It would be interesting if twu decides to test MB to see where it falls in the spectrum of lab tests; however, from my experience MB has a more consistent playability over time, so while CoF crosses are just as comfy, I find them to get too springy after the same time period. MB wins the tension stability battle. CoF is a great second place. I've decided to settle on the tg/mb setup and end my string experimentation madness. Out of the handful of hybrids I've tried, CoF & MB crosses both stay the softest for the longest period of time. That's a tough attribute to find as most polys get a bit harsh if you don't break/cut-out the strings within a few matches.
While I do agree that low string-string friction results in easier spin, I think the small differences between the various polys will result in negligible (if any) difference in actual rpms. Regardless of the poly, a gut/poly setup yields great spin and playability; after testing out at least 10-15 different gut/poly setups, to me the real decider is *playability over time*. Some setups you can feel the poly Die within a few matches and some even a few sets. Few setups stay soft or consistent for a long time, while most others become harsh and/or lose control match by match. Some setups create a mismatch of properties where the stiffness of the poly overshadows the feel of the gut. Some are great for only a match. All these factors and various *subjective feel* components that I've noticed have lead me to ToughGut/MB, but this may not work for others with different racquets, preferred tensions or preferred feel requirements.
That said, if you like a dense, flexible frame, and employ a variety of spins and flat shots, looking for a good pocketing feel and consistent playability over time, I'd take a look at Gut/MB.
Head Pro Tour 280/630, MP 18x20. Tour Bite 18/Mosquito Bite.
Sampras serve, Agassi backhand and Federer forehand. heh heh
Last edited by JT_2eighty : 10-15-2012 at 08:33 PM.