Aliens is available in both cuts on the BD.
Yeah but it’s still not 100% the original unaltered version because Cameron couldn’t help himself / leave well enough alone and made a few “fixes” like erasing Lance Henricksen’a visible torso in one shot of the final scene. In the scene where Ripley and Newt are stuck in the room with the facehugger and Ripley tries slamming a chair against the window, visible marks on the glass from previous takes were erased for the bd. I’ve heard other shots were tinkered with but never seen definitive before-and-after screenshot comparisons. It’s not even the '86 version editorially since there was actually an editing error when Ripley pulls a couple different guns from the rack that was correctly reordered for the blu-ray.
The color-timing doesn’t bother me, though. I saw a photo from a 16mm print and it actually looks closer to the blu-ray.