It is a different transformation that looks similar.
Two genius hitters who represent the KBO league, Lee Jung-hoo (Kiwoom) and Kang Baek-ho (KT). They have extensively tweaked their hitting mechanics this season. The reason is the same. To get better at baseball. Lee Jung-hoo has a strong purpose to prepare for major league pitchers a year later, and Kang Baek-ho also struggles to recover his honor after a year of sluggishness.
However, the orientation is slightly different. Influenced by Ha-seong Kim (San Diego Padres) and others, Lee Jung-hoo made changes to cope with the 160km fastball. According to the explanation of hitting coach Lee Jung-hoo and Kang Byeong-sik스포츠토토, whom we met at the Arizona spring camp, the position of the arm went down from the ear to the chest area in the preparation for hitting. It is a measure to minimize the time to reach the ball so that the timing of hitting the faster ball is not delayed. Ha-seong Kim also added an explanation that he succeeded by changing similarly.
On the other hand, Kang Baek-ho made a slightly different choice than other hitters. According to Kang Baek-ho, whom I also met at the Arizona camp, he decided to pull his hitting point back about half the ball. In modern baseball, batters are greedy for long hits. I believe that the hitting point should be formed earlier so that long hits can be produced without being fooled by the breaking ball.
However, Kang Baek-ho believed in his innate flexibility and athletic ability and decided to focus on accuracy by pulling back the hitting point. There is almost no difference to the naked eye, but there was also an explanation from the person himself that he puts a lot of effort into overcoming the difference. Kang Baek-ho and the KT data team concluded that the hitting point went forward a lot, and because of that, the manned ball was deceived too much and the productivity decreased.