According to Bahá'u'lláh , all of the Manifestations of God have the same metaphysical nature and the same spiritual stature. There is absolute equality among Them. No one of Them is superior to another.
Yes, but wasn't Baha'u'llah also claiming to be a prophet? In which case, elevating himself to the same position as all those who came before might be seen as a tad egotistic.
Of course, that's presuming I haven't misunderstood his claims?