This page is part of the web mail archives of SRFI 111 from before July 7th, 2015. The new archives for SRFI 111 contain all messages, not just those from before July 7th, 2015.
My feeling is that the spirit of equal? is "equivalent same in the absence of mutation, eqv?, and eq?".
However, R7RS abandoned this for records, presumably for a good reason.