There are two versions of Snowy from the Undertale soundtrack
Yes there are, this is actually a reupload of 2 separate videos from my old channel, i've just mashed them up because it felt right. I believe that each song on the soundtrack was exported separately, which means that each song on the soundtrack is a different version that the one's heard in game...
The difference in the two files is most definitely not intentional and Toby corrected it when it was time for the proper release of the soundtrack.
These videos are from 2023, I used jacksepticeye's UT video just to show that the version of the file playing is the in game version (mus_snowy.ogg) rather than the ost version... The first part of my recreation is the in game version, the second loop is the ost version.