Let's talk about LAY first. Lei is a member of EXO group and the only China singer in this men's group. EXO also made an exception and set up its own studio for LAY in China. Now LAY can be independent. In the theme song EIEI of Idol Trainee, you can see the most direct difference between his dance and others, and this other people's answer must have said a lot.
Then there is the stage mask that cooperates with pd, from which we can see that Kun's dance foundation is still relatively weak. When I say weak, I don't mean that he can't dance well, but that his movements are not atmospheric enough and his feet are not clean enough, especially compared with pd, his movements are a little dirty and not neat enough.
What's more, he basically didn't learn other dances before learning kpop, which means he didn't have any other messy styles when dancing. For example, before you danced ballet, your movements were softer and your strength was contained in it. In the past, when you danced in the national standard, you would unconsciously want to move your hips when dancing. Before you break dance, your movements will be more difficult and ugly.