Is the 1st or 2nd file the latest development build (nightlies)?
Your description (https://ftp.osuosl.org/pub/musescore-nightlies/windows/) says that the first file in the list is always the most recent. Somehow I never read this manual and always assume that the file with the newest date (plus consecutive number) is the current nightly. At least I'd find that more logical. I mean, "2018-09-20" sounds old by now ;-)