Flew over my head. Still, don't think that really makes a solid chase. If those where the intentions, why aren't they stated more often when they talk about the creatures?
There where other differences as well, the more developed chestburster, the faster impregnation and such.
My case is a lot of fans want a better intern logic in the fiction, I get that and they tend to project stuff that isn't really backed by official sources, (at least in the beginning) However, I might be projecting too.
I like Covenant, its an entertaining film with my all-time favorite space monster, but I am looking for the opposite of most fans, I want it to be disconnected from the original trilogy. All these subpar prequels can f**k off from my treasured sci-fi classics.