Any racquet experts here that can enlighten me? Why is there such a difference between all those rackets? Aren't they supposed to be very similar? Almost identical in all the specs? Same molds? I stopped playing with Wilson after I played with the BLX for a half year...I tried different sticks including Heads and Babolats and they were all good but not perfect. Now, few years later I tried Ncode 6.1 again,and it was like going home, I love everything about this racket...I felt frustrated that I wasted few years of my tennis playing with something which wasn't mine. The think is that I used to change every time to the new model of the 6.1 the moment they appeared. Every time I thought : well, why would they make another model if they are not improving it. Look- even the pros switched right away.(yes, yes now I know they are using paintjobs) So I never even thought of going back. After I couldn't stand the BLX, I just switched thinking that 6.1 series is not for me anymore. So the question again: does anyone know why do they play and feel so different?