I would say there is a definite distinction between the two, in definition and in proper usage. Et cetera, often shortened to etc., means literally ...
The grammatically correct way is "Einstein et al.'s paper", because to indicate possession by a noun phrase in English, the 's should be applied ...
From Latin, abbreviation of et (“and”) and alii (“others”) (English: et alii) and its ... However, in lists of authors of a published work, et al. is still regularly used.
Keep using etc. instead of et al.? Check out Ginger's spelling book and make sure you never confuse etc. and et al. again!
Even if you don't speak Latin, you should know the two meanings of et al. Learn what et al. is, how to use it, and what mistakes to avoid. ... Et Al. vs. Etc.—What's the Difference? What's the difference between et al. and etc.? Whereas etc. refers ...