Faster top end or acceleration? In stock form, Sport Rider and Motorcyclist (sister mags) have the kawi as the new busa killer. But a gentleman's agreement exists between the moto companies with govenors in place at 186 mph (300 kmh). But of course with a few mods a busa could in turn outrun a kawi. Guess it depends on what has been done to the bike and who is riding it. If your in the market for a bike that you plan on doing some customization, then the busa has been around since what? 6 years? While the kawi is brand new this year. Many moto journalists also believe that Suzuki will up the ante next year with a new busa. Will they up the displacement to meet or exceed the kawi? Who knows? I can't wait to see what they come with though. I'm also interested in what direction they take the styling of the bike. (hopefully no more bee's ass)