Choosing between seemingly identical episode files on DVDs

[HoosierDaddy]

Hi,

I have used MakeMKV in the past to extract movies from my DVDs for our HTPC running emby.

Am trying to do the same for a few miniseries DVDs we have. On the first of 6 DVDs for the first mini-series, not too hard to figure out which files are episodes but there are two files for one of the episodes with the exact same run time and are less than 100kb difference in file size. Both 720x480. Both have the same 3 subtitles (English, Spanish and Portuguese). Both appear identical at exact same times I checked. I see the same situation on the second DVD.

How can i figure which is the right/best one to use? I have 5 or 6 mini-series to process. Would hate to find out later they all have seemingly duplicate episode files and some have some unintended side effects. Are there some other attributes I should check?

And what possible reason could the publishers have if the files are identical?

Thanks