This is the first time I've used this kind of software. It was the only one we could apply to analyze with MISRA rules. At my new company, I tried to use Klocwork. I tried to use it, just once so I cannot compare it exactly with CodeSonar. I also have a plugin for my Visual Studio and I try to make it work. It's not easy, however, I don't think that we have this kind of functionality with CodeSonar. It can do some incremental analysis. However, since this feature is also available on CodeSonar, it would be a good idea to have a plugin on Visual Studio just to have a quick analysis.
