hey guys i've been having trouble staying committed to a racket i currently own a pdr cortex strung with rpm blast 16g at 57 pounds. My friend has a pure drive gt strung at 56 with fxp 17 strings. My question is that why is it i feel that i can swing faster creating more topspin and can get around the ball easier with the pure drive? i noticed i was hitting with his racket and my shots were able to jump higher. as with mine i feel that i may contact it late and my shots have a flatter trajectory. would .5 oz or 14 grams really make that difference?