Stephen Mulhall details some similarities in his book On Film, which he refers to as 're-enactment'.
- Strategy and weapons evaluation after the first Alien incursion, complete with disparagement of the android
- Ripley encountering a facehugger from the ceiling in med lab, throwing herself backwards, then men throwing themselves in to protect her
- Prowling around the Sulaco while the crew sleeps
- The use of flamethrowers, TV monitors, trackers, airducts, flashing lights, hanging chains...
He also talks about how Cameron scatters the number 2 around the place - O2 on the wall next to Newt's bed, the number on the second dropship, the lift gates in the AP station (27 and 28), the number of the loading lock Ripley chucks the queen out. And B for Bishop being the second letter of the alphabet. (Plus some he missed like the M22 on the door where the power loaders are stored, the lift in the AP goes to sub level 2, the locator reads 22.8 when Ripley looks at it, 2D painted on the front of the APC, number 2 in the background in ops during early colony scenes, Simpson and Lydecker have a chat in front of big signs that have Level 2 on them).