Who sings best in Jay Chou, Lee Jung Hyun?

There is no comparability. First of all, Xian sang electronic dance music, while it was street dance with different styles. Secondly, Xian is a female voice, Jie is a male voice, with different vocal ranges and different timbres.

Finally, what style you like depends on the fans themselves. The quality of music is not absolute, it depends on the level and hobbies of the audience!

Supplement: I think both can, each has its own style!