dude yes and no i know this is an old thread but whatever..when u box u hit with concentrated energy with that punch..kcikboxing u hit with a flash to stun opponent or to combo sweep or other leg movemens ur setting them up all the time.....kickboxing i use a half-fist while throwing so right upon the point of contact it closes..thats for speed and control...where as boxing close fist all the time..for all power..less grace