well that depends lol. mostly on how you look. if your a super provocative girl or very handsome boy than it can vary on how pretentious the one or other is but you can say out of both genders that if their both sublime in features that they'll have a case of vanity.
Both can be very narcissistic. I know this guy who is very narcissistic but many girls can be. I don't think a particular gender would be more narcissistic than the other though. It would depend on the person.