Going through Faiths & Avatars and its sorta-followup Powers & Pantheons I saw the various Specialty Priests listed there, and some of them looked pretty neat with all sorts of unique abilities. Looking back at the Player's Handbook (p. 49, 2nd edition) the only thing I could find is that I can find that is different is the spells you get access to.
So I wonder: if you qualify to be a Specialty Priest for your god, is it always the best choice to be a Specialty Priest instead of a regular Priest? Or does it depend on the deity in question?