Had both for extended demos. As KalEl put it, the Platinum 99 plays a bit like a pro stock prestige. I liked the Gold 99 and 94 but fell in love with the additional control of the Platinum 99. I made the switch to the Platinum about a month ago and have loved playing tennis again. I think it has a more solid feel to it when you really generate a great amount of racquet head speed. The Gold series was great, but did not have that solid feel I just mentioned. Maybe it's the string pattern, maybe it's the difference in flex. Either stick is a winner in my opinion. Take them out for an extended demo.
I am going to win Wimbledon one day -- even if it is the over 40s doubles ..." Goran Ivanisevic