The 1979 Lucy is basically a Mina named Lucy, and vice versa. The same as in the 1979 Nosferatu. Speaking of Lucy, this one has some of the most disturbing scenes of her first death, vampiric trasformation and second death among all the adaptations.

I, too, don't find Lugosi that sexy. Maybe he was sexier while playing Dracula on stage? It appears that Dracula just became a placeholder for the tropes set by other vampires. The more I hear about old vampire stories, the more I'm convinced that seductive vampires were not that uncommon in the 19 century literature, if anything, it's Stoker who decided to deviate from popular tropes and make his vampires unambiguously evil, mostly devoid of depth and not having much page time at all.