Expoloitative narcissists almost always have a selfish, hidden agenda when they “love bomb” or otherwise seduce you. They might show great interest in you, which can be highly intoxicating. However, their interest is almost always self-serving. And, sadly, too many folks these days mistake interest for regard.
Covert personalities are not who they appear to be. They know how to look good but don’t care much about actually being good. By the time you figure out who they really are, you’ve already invested much and a lot of damage has been done.
Amiable narcissists come across as lovers. But genuine lovers care about you, whereas narcissists only really care about themselves.