the 2 different patterns are a little easier to see in golf, but WAY easier to feel there and now VERY well described by Hardy, PLANE TRUTH FOR GOLFERS.
either you swing around, with active shoulder turn turning the bat/club, OR you swing down, synching up and down arm swing with back and forth turn of body, creating stretch and fire by the bat swinging/club swinging in one more downward plane while the hips turn the body more levelly.
the mlb pattern is a variation of this second type pattern where the upper body plane creates enough resistance the level turning hips that trajectory can be controlled and adjusted late.
2 ENTIRELY different motions, but both using the same underlying principles.
either you swing around, with active shoulder turn turning the bat/club, OR you swing down, synching up and down arm swing with back and forth turn of body, creating stretch and fire by the bat swinging/club swinging in one more downward plane while the hips turn the body more levelly.
the mlb pattern is a variation of this second type pattern where the upper body plane creates enough resistance the level turning hips that trajectory can be controlled and adjusted late.
2 ENTIRELY different motions, but both using the same underlying principles.