Shay Chen is apparently a “sec tool addict.” As such, he’s taken the time to compare a huge list of web application vulnerability scanners and present his findings. This is way too huge to digest quickly, so I won’t speak to his accuracy (even if I could spend the time to do so!), but this report can serve several purposes, the least of which is a very long list of tools to use and abuse in web app security. Hopefully he has somewhat valid results. I expect most tools have a sort of give-and-take when it comes to detecting vulns and being useful. It would be folly to try and rank them against static tests, as I’m sure you’d need a blended approach to get the most chance at high coverage. (He basically concludes as much, if you scroll down far enough.)