It's quite obvious. Alien/Blade Runner shared universe.
Those movie do not share the same universe.
There are things that point to them being a shared universe. SM, your knowledge is needed here. I would explain but I am on my phone on my way to work. Citing sources would be difficult to accomplish.
SM is not needed here. He's not an oracle. Both movies do not share the same universe. Period.Blade Runner
Easter Egg in Prometheus doesn't count. It was made just for fun.
Besides, how movie based upon Philip K. Dick novel has anything to do with Alien
universe and vice versa? I cannot see any connections.