This question is borderline TeX related but I think it may still be relevant.
Apart from the fact that the latter is comparatively expensive, both softwares seem to offer next to no BibTeX support. Sure, they allow exporting (or even maintaining)
.bib files mirroring the library but those files aren’t really usable in common scenarios (e.g. when you need to manipulate the typography, when specifying the sort key by inserting TeX commands in the authors list, or when you want to customise the citation key).
On the other hand, these citation managers have a very handy feature: when you drag a PDF onto them, all metadata (title, author …) of the article is automatically imported from online databases and doesn’t need to be added manually or by explicitly downloading an exportable citation from the journal website.
So far, my go-to choice has been BibDesk which is a solid little software.
But it seems that BibDesk doesn’t support the Mendeley-style automatic import of article metadata for PDFs. Instead, I have to enter all this information manually. This becomes old quickly.
Turns out to be wrong! – See answers below.
So, Is there a citation manager which plays nicely with BibTeX and has automatic metadata import?
(Incidentally, I don’t want to complain about BibDesk, it’s otherwise an excellent software and it being Open Source the correct answer would of course be “well, submit a patch / pull request for this feature”. But perhaps somebody has already done the work?)