I'm just amazed at Bruce's speed and control. I mean, he's coming SO close to that one dude in the screen test, but he's totally under control and it's all in the blink of an eye.
But yeah, I really don't know enough about Jet Li. His films are flashy and impressive, but that doesn't necessarily translate into actual ability to fight, which gets you back to Bruce Lee. Lee was a theorist about martial arts and studied it intensely. He wasn't a performer alone. He was DEEPLY entrenched in martial arts and the study and perfection of fighting forms for practical purposes beyond the more balletic stuff you see in films and TV.
None of this is to say that Jet Li isn't a master in his own right, just that I haven't heard as much about him. He seems to be primarily a performer, rather than a martial artist first and foremost. While his style seems more brutal than, say, a Jackie Chan, he seems to be far more about the acting gig than the martial arts. Now, I could be wrong about all of that, because I know next to nothing about the guy, but looking good on camera doesn't translate into being an effective fighter (at least not against someone who is also an effective fighter).