Though not beautiful, we already have a way to fulfill this rare use case:

    >>> class Foo():
            pass

    >>> s = super(Foo)
    >>> t = super(Foo)
    >>> (s.__self_class__, s.__self__) == (t.__self_class__, t.__self__)
    >>> True

Though awkward to write, it is completely explicit.  That makes it better than giving "s == t" a profoundly different meaning than "s.__eq__(t)".  IMO that would be an API mistake, making it tricky to do code review and requiring special knowledge of a rare corner case.