tiSP sx weighs 89grams and ti10 3U is between 85-89grams,so since they are of about the same weight,which one is more powerful,which is more worthwhile to get if ti-10 is cheaper.thanks for all comments
I owned both rackets. I found that TiSPSX suits me better. I can swing better with it than with Ti10. Moreover, the head is not as heavy as the Ti10, but I can smash better with TiSPSX because I can swing faster. It is also lighter than Ti10 and have larger sweet spot. Nevertheles, I think both rackets are the best in the market. I'm thinking of getting TiSPSR now.