On the distinction between these two verses, see W.J. Dalton, Christ’s Proclamation to the Spirits: A Study of 1 Peter 3:18–4:6, Analecta Biblica 23 (Rome: Pontifical Biblical Institute, 1989); also John Elliott, 1 Peter, Anchor Bible series 37B (New York: Doubleday, 2000), pp. 648–665, 730–742.
