I was suggesting that the similarities are more than co-incidental.
Well, both Lucifer and Baldur were in pre-Christian pagan religions. Lucifer, originally from the Greek Heosphoros, the "Dawn-bringer," (AKA the planet Venus) was seized upon by the Christians (originally Jerome, in, IIRC, the 4th century) and "turned" evil. Christian missionaries did the same thing in Scandinavian lands, trying to convince the pagans that their gods were instead Christian demons.
Neither Baldur nor Lucifer are Biblical. Apart from those similarities, there's not much alike about 'em. One's a planet whose name was seized upon and turned into another words for an evil demi-god, the other is a god of good. It's silly to try to try to link them more than that.