My vote will go to JET Li. He is more elegant than Chan. JET Li has more of an acrobatic style and obvious mastery of his art, where as JACKIE Chan for his entertaining fight sequences in all his movies. You can see both of them in The Forbidden Kingdom. Chan is a master of improvising random objects and such as weapons, whereas Jet Li’s fighting seems to be more direct. In open field fight Jet Li has the stronger defense and but in cluttered place with available objects Jackie Chan have the strong points.
Jet Li due to all the fighting but for Jackie Chan he's good at action/comedy. Jet Li looks better in Kung Fu if you ask me.
These two Kung Fu actor can't be judged. They both are better in their own position. Jankie Chan acts on Comedy action roles and Jet Lee act with hard core actions.
both of them have their own style,, Jet Lee has a serious kungfu style and many people have ever dreamed but if you say about jacky chan, most of his movies always combining kungfu and some jokes, you can say his style is daily kungfu LOL