The Pathogen during Alien Covenant's depiction; a spore that enters through just any orifice, kills you or results in a gangly pale translucent skinned humanoid with barely any discernable features save for sonetimes back spikes, a tail, a pointed head and a goblin shark like pharyngeal jaw. They only kill things.
It is without that sexual component, even the method of incubation comes across more like a parasitic coincidence, than something with a deliberate analogue. If you want that stuff with the Pathogen's representation you have to get much more convoluted with something like Prometheus.
On top of being deeply psychosexual the Alien causes amnesia and takes a longer time to incubate allowing farther spread of itself, the Facehugger's able to be independent but creation of a Chestburster's consistent, it can perpetuate itself infinitely through a hive structure that it is able to use as camouflage and it uses acid for blood.
Even half aside not featured in that film it is imbued with some pretty clear advantages.