I really suppose it depends on which style you are using, for both Wing Tsung and Karate. That's like asking "who would win in a ping pong match, a swedish person or an irish?" I really think you have to be more specific. I can tell you what I know about Wing Tsung, however. Wing Tsung is an art which focuses on "root". Root is your connection to the ground, the path that energy flows between the ground and your fist (not magical chi energy or anything, kenetic energy). You learn how to deliver a great deal of force very quickly, with little or no space, without winding up, and without isolating one of your limbs. A good pracitioner can deliver around 10 attacks in a second with enough force to nearly end the fight, and with the focus on root, if your opponent is not similarily trained they will probably be knocked over, at the very least put in a position where they can't hit you hard enough to be more then slightly irritating. It is because of these speeds that Wing Tsung focuses on sensitivity drills. If you use your eyes, you will not react quickly enough. You learn to be sensitive to slight movements, shifting of weight, flexing of muscles, you feel what your opponent is thinking and react as the attack starts, instead of right before it finishes. That's the only way to possibly defend against attacks that come the fast. To someone not similarily trained, these techniques can be devistating. I don't know why you ask it to be compared to Karate of all things. As I said, it may depend on which style you use, but every Karate or TWD school I've seen barely has skill worthy of wasting my breath pointing and laughing. BJJ, Tai Chi, some of the kung fu styles offer up a challenge. BJJ is especially good at trouncing Wing Tsung, the focus of their style makes uprooting and other wing tsung techniques irrelevent against them. But karate?
