Yep, agree. This also supports the idea that you shouldn't get too hung up on which to use, because hopefully that decision was made for you and one of these was selected.

> They do not, categorically, provide "functionally equivalent security"

Eh, disagree, if your database is breached and your digests are salted, any of these is fine. Of course there are technical differences because these are literally different algorithms, the actual difference in security provided by each is one of degree, not category. Unhashed vs hashed, and SHA2 vs bcrypt are what I'd call differences of category.