How could the Wilson nSix-One Tour 90's spin potential only being rated as 73? I have once played with it and although the tension had allready dropped quite a bit, the string which was Wilson Sensation isn't your best bet for spin, offered very good spin potential to me! According to TW, Head's Liquid Metal Prestige mid its topspin is rated as 78!!! How could this be true, when both racquets have the same headsize, the Prestige is more flexible, but one is 16-19 and the other 18-20 string pattern!? I'm not a Wilson fan at all, don't like their gripshapes, their low sweetspot and the racquets seem to flex at different places than my Head Prestige Classic, but I have to admit that it's spin potential was quite a bit better than my Prestige. What's your opinion about it's spin potential compared to the Prestige?