A lot of the games from the early 90s PC sounded different on different sound cards. I remember the first time I went looking for some old Ultima 6 music and I was like "woah, this doens't sound like I remember it" and then I realized the rip was from a different card than I had in my PC at the time.
Adlib vs Roland vs SoundBlaster vs etc
I'm just going to leave a couple game soundtracks here. Your linked music doesn't jump out at me as familiar, but like I just mentioned, maybe something sounds slightly different from PC Speaker vs. Soundcard MIDI synthesizer stuff. I have a feeling this is going to turn into a "old game soundtrack" thread at this point (or maybe I'm just hoping)
Ultima 6:
https://youtu.be/EKUrUdL2h1M
LOOM:
https://youtu.be/aWXxl1oPxGU
Betrayal at Krondor:
https://youtu.be/0U0Lh8-apvc
From the stuff you've listed, I assume you're looking at earlier than what I've listed?