Exactly. Well, sort of. At any rate, you did marvellously, you majestic beaver!@Zippix the second version is from my collection.
It's the original version MangaGamer first offered - if I remember correctly?
The first version is voiced patched.
The first one in the OP is the 2011 MG version (which, because of seiyuu company copyright issues and blabla at the time) was unvoiced, but there was a (semi-official? or something) voice patch ('patch3.xp3' indeed, as you showed behind the spoiler) for it by early 2013.
Then they did the proper "Voiced Edition" release on 2013-10-04. But since there was already the "Voice Patched" version around, I think nobody really bothered with it (piracy-wise, at least). I couldn't seem to find it anywhere, at least. Until now, that is...
The mentioned Reiji voice patch can only be applied onto the 2013 "Voiced Edition", so the one you added as the second version here.
On a related note, seems that the guy working on the patch over at vndb actually decided to go the other way, so porting the English onto the new 2019-12-20 Fully-Voiced HD version - which he needed many own tools to develop for, and lots of effort; so even more props to him!
And that's good news for us, ultimately. Still will be needing someone fluent in Japanese to help him out with the final product. Here's to hope!