I've been collecting vinyl copies of cd's for the past decade or 2.. and only have a few that I've kept... well, maybe 6 or so..
Of those, I've noticed the following, if the cd was produced after 1990, the vinyl will sound either improperly eq'd for vinyl or 'good' but not exponentially better than the cd.
-Examples, John Mayer, poorly eq'd, Peal Jam sounds a little better on vinyl to me sometimes..
With records that were released prior to 1990, the records sound better than the cd, every time. Not only do they sound better, they sound more like music and like there was no 'digital' anything in the recording process.
-Examples, Parliament's Mothership Connection on 180g vinyl (newer pressing) vs. digitally remastered cd is HANDS DOWN much better on vinyl. James Moody, very good on vinyl, poor on cd. Is it mastering decisions? I don't know. Bill Evans... same deal... I could go on and on..
This is only my casual observations.