[SciPy-User] Documenting numpy vs. scipy fft

As everyone here knows, both numpy and scipy have their own fft modules. I have looked at previous discussion on the mailing list, and it looks like scipy's is the recommended one. However, I can't find any mention of this in the numpy and scipy documentation. As far as I can see, neither numpy nor scipy even acknowledge in the documentation that there is an fft module in the other, not to mention provide any comparison or guidance to users on which they would want to use. If I didn't just miss it, might this be a good thing to have the differences between the two modules explained somewhere, and give users some hint as to which they would use (either in general or in specific situations)?