Still thanking my lucky stars that I ever stumbled across this thread and felt prompted to begin looking at gut/poly at all.
Presently liking VS/CoF massively in my Blade 98, and look forward to contrasting later with Pac Classic/CoF. Tried the latter in several frames and it was just everything I could ask for and more in particular two frames. Where it hasn't worked so well for me previously has been in more powerful open rackets, which is surely due to too low tensions.
Anyhow, just 'reporting back'... TBH I'm still staggered and delighted by the duration, performance, value for money and comfort these set ups provide.