I know all the readers of rogueclassicism know the difference, but in case you get tired of explaining it, you can point folks to this video from the Merriam-Webster folks (there are a pile of other Latin abbreviations mentioned too:
i.e. vs e.g.
quidquid bene dictum est ab ullo, meum est
rogueclassicism 
There are not only Latin abbreviations; his final sentence is spoken in Latin!