If you were to draw a line at the bottom of the glutes and go from the right to the left, that line is at a greater upward angle in the minor league photo then in the major league photo. Similarly, if you drew a line across the top of his shoulders, that line is a more downward angle in the minor league photo.
I don’t know how it changes the bat swing, but his torso is different in the two photos.
How does this compare to prior AAA, AA, A ball from prior years?
Was this a hitting coach suggestion?
Should that high leg kick be changed or even removed?