Well, i dont believe in demos. I believe in real fights with everything included.In my view, lee IS the best fighter ever and the actual prophet of the ultimate fighting.Dude, hearing all his counterparts and friends(themselves martial arts professionals) describe his poweress,speed and bloody encounters ; i would definitely put my bet on lee.
Tony Jaa is just a performer with martial arts background.Its not how high u can kick but how fast and effective u kick ur opponents ass.