I can't say which is better or which is better. Standing piles emphasize strengthening some functions, such as: strengthening the stability of lower limbs, some for exercising mood; If you play Tai Ji Chuan well, you can exercise all parts of your body and enter a specific functional state. Both of them have the function of strengthening the body, but the choice should be based on your own preferences: those who like sports can play Tai Ji Chuan, and those who like quiet can practice standing piles, so the effect will be better.