Comparison of C++ unit test frameworks

I know there are already a few questions regarding recommendations for C++ unit test frameworks, but all the answers did not help as they just recommend one of the frameworks but do not provide any information about a (feature) comparison.

I think the most interesting frameworks are CppUnit, Boost and the new Google testing framework. Has anybody done any comparison yet?

See this question for some discussion.

They recommend the articles:
Exploring the C++ Unit Testing Framework Jungle, By Noel Llopis.
And the more recent: C++ Test Unit Frameworks

I have not found an article that compares googletest to the other frameworks yet.

Stack Overflow Q#242926, score: 107