Is it "snap" or "snapcraft" to work with keys?

More nitpicky pedantry as, in trying to clarify working with keys, one can use either “snap create-key” or “snapcraft create-key” to create a key (is the snap form deprecated?). Oddly, with “snapcraft”, you can list your keys with either of “keys” or “list-keys”, while “snap” confusingly recognizes only “snap keys”. (“snapcraft help” does not mention that “keys” is an acceptable abbreviation.)

Finally, even “snap help --all” mentions nothing about its ability to work with keys, at least to some extent. What is best practices here?