Disks with two "main feature" tracks

[shadow-archetype]

I've been using makemkv for a while and have processed tons of DVD, Blu-Ray and 4K discs to add to my now extensive library.

There is one minor thing that confuses me, and searching the forums has not yielded any answers (or maybe my search terms were ineffective).

Many, if not both disks, especially 4K discs, present two video tracks, in addition to smaller special feature tracks, that are roughly the same estimated filesize. One specifies the number of chapters, the other one does not.

Even a simple 4K like Sicario, which when I pop in the disk to my 4K player, doesn't have a lot in the way of audio and subtitle options, has two "main feature" tracks in makemkv, exactly as I described above.

I normally pick the one with the number of chapters shown.

Recently, I selected both tracks, and after viewing both mkvs in VLC, I can't for the life of my tell the difference. Each has the same runtime, almost identical file sizes (to the 100's of MB), and at first glance, the same codec stats in VLC.

Should I just continue to process the track with the chapters as I do now, and ignore the rest?