Bro between the one who changed the world in many ways is Bruce Lee. Thus in terms of making a difference it has to be Bruce Lee by a long while. Here are the things that Bruce Lee led or influenced.
1) Brought Chinese cinema to the fore
2) A Chinese can be formidable opponent off the screen
3) Led to a massive boom in chinese martial arts across the western word from NZ to Canada. Every kid black, white and blue wanted to learn martial arts and their mums were keen.
4) His form of Martial arts jumped a couple of rungs to the top. In unarmed combat, it was the most feared
5) He was never recognised as an entertainer which is funny when it all began with movies but as phenomenal tour de force as an individual and a person who made a difference
6) Chinese were no longer seen as wimps to many in the physical space.
I have no doubt that Jackie Chan is a phenomenal actor, highly entertaining, wonderfully choreographed and executed stunts, attracts a wider audience than Bruce Lee will ever hope.
But bear this in mind, nobody from a 5 year old kid to a 70 year old man or woman will sport a t-shirt with Jackie Chan face on it. No momentos or collectors items will be made of him, nobody will claim him as their role model, their star. We all love ice cream but only a few will know what a Cabernet Savignon is. One is class and one is common.
Frankly there is no comparison between the two where the wider world is concerned. Forget about te 1 inch punch which is bullshit and scientifically improbable, forget about fighting ten men. It about which man changed the world.
Bruce Lee movies are boring to watch. I love Jackie Chan movies, great stunts he performed.
Bruce Lee is a martial artist, Jackie Chan an entertainer. Cannot compare one.
I can understand why the uncles here all love Bruce Lee as my old man likes him too. LOL!