Have you ever compared Klocwork with Findbugs?

Have you ever compared Klocwork with Findbugs?

pWe are using Klocwork as a static analysis tool./p pKlocwork is a
commercial tool and has many advantages but also has limitations like
false-positives./p pI wonder who has ever compared Klocwork with other
open source tools such as Findbugs./p pCan you say that Klocwork is
superior to other open source tools, especially Findbugs in aspects of
false positives and false negatives?/p