I already have used the Google CodePro AnalytiX but I never used Findbugs.
My first impression with Findbugs is that it is harder to configure. After that, I believe that both are similar.
What's your opinion?
Just one more question related: None of these plugins sent our code to the servers, right? (for example, if we use CodePro our code isn't sent to Google Servers).
Update in 2016: CodePro Analytix is not available anymore, so go with Findbugs.
Original answer
better in CodePro Analytix:
better in Findbugs:
All of the above was more related to how you can work with the tool. The actual finding of bugs may depend very heavily on the project to be checked. In the past I often suggested to use both, Findbugs first, CodePro afterwards:
Do the first checks with Findbugs, as it finds the more severe issues. But after those have been fixed, you may find yourself in lots of noisy issues (or even false findings). Therefore after working on the most severe issues of Findbugs, I suggest switching to CodePro Analytix as it has less false findings and can be controlled in more detail.