[class.default.ctor] Default member initializer and brace-or-equal-initializer

Currently both item "default member initializer" and grammar production _brace-or-equal-initializer_ are used in [class.default.ctor]. As _brace-or-equal-initializer_ is only used together with non-static data members in [class.default.ctor], I think it is equivalent to default member initializer there. Is it intended to use both forms?