Children. Narcissists like to raise baby narcissists. Often they pick a favorite child and focus all of their efforts and attention on that child. The other children are left feeling inadequate, unworthy, and insecure. Males generally view children as a nuisance, frequently complaining that they, not the children, should have all the attention of their spouse or partner. Females view children as an extension of themselves, even when the child is an adult. Everything the child accomplishes is a reflection of their superior parenting.
Competition. Nothing proves supremacy quite like competition for narcissists. They love an opportunity to excel over others at work and home. While the competitiveness is frequently praised in a job, it is not amongst family. Males treat other males as rivals. This can be seen in brother/brother and parent/child relationships. Females battle with other females for dominance. This is seen in sister/sister and parent/child relationships.
This is not a complete list of differences, rather it is meant to bring awareness as to the many ways narcissism can be portrayed.