See my friend had this theory, and thus far I can't find evidence to contradict it. And even if I do, it has to be a small minority compared to the overall results.
His theory is that if a song as two or more versions, you will tend to like the one you heard FIRST the most. Not which was made first, necessarily. The one you heard first.
I can't for the life of me find an example where I disagree with that. There are some samples where I have very similar like for both, but I can't find an example where the 2nd version I heard turned out to be my favorite.
Your SPG was interesting, but I could never see it replace the original as my favorite.