Looking specifically for an in-universe canonical answer (with citations) such as insight from the novelization or some other form of media that might have made a reference to this stuff such as a spin-off comic or book.

Near the beginning of Aliens (1986)—in the locker room just after the Space Marines and passengers on the Sulaco come out of Hypersleep near LV-426—Private Vasquez makes the following comment about Ripley:

Private Vasquez: Hey, mira, who’s Snow White?

Corporal Ferro: She’s supposed to be some kinda consultant. Apparently she saw an alien once.

Private Hudson: Whoopee-f**kin’-do. Hey, I’m impressed.

I realize that in the film they state there wasn’t enough time for a debriefing before going off on this mission, but it seems kind of odd to me that Corporal Ferro would have some insight into who Ripley was and Private Vasquez wold be completely clueless.

Perhaps this was due to Ferro’s higher rank and the rushed nature of the mission, but is there any citable in-universe explanation as to why one Marine would know some vague details about the nature of the mission while another Marine was not really informed of anything?