In the original disc, there would be two playlists. Each playlist plays two files. First, one of two crawls (relatively short). Regardless of which crawl is played, it then moves onto the same much larger file for the rest of the film. The official Blu-ray does the same thing for alternate language crawls.

When you set makeMKV or similar to rip everything, it makes separate files for the different versions. It’s the two individual crawls, each appended to the same rest of the film. If you ripped the seamless branching version of Blade Runner, you’d get three different full sized copies, etc. If someone made a disc with 100 options, each with one tiny change, you’d get 100 files.

It’s interesting that you noticed something very subtle about the title fading out. Surely there is also EPISODE IV (or not) there, right?

Yes, that’s the full size ISO. MKVs have a little less space wasted than the format on discs. So, you save even more space for each file than just the excluded crawl.