Set difference and/or intersection of dir(pd.DataFrame) and dir(dask.DataFrame) with inspect.getargspec and inspect.doc would be a useful document for either or both projects.

pyfilemods generates a ReStructuredText document with introspected API comparisons. "Identify and compare Python file functions/methods and attributes from os, os.path, shutil, pathlib, and path.py" https://github.com/westurner/pyfilemods