Multiple copies of the same album?


I’ve accumulated a lot of music in the last 4 decades, and I listen to music via LP, CD and hi-Rez audio. Among all that I only have a handful of titles for which I have copies in multiple formats- for instance, I have one recording in vinyl mono, vinyl stereo, CD and hi-Rez. 

For those of you that also listen across multiple formats are multi format versions a small part of your library or do you seem to have a lot of that in your library? 
128x128zavato
Yes, though mostly multiple different pressings of the same LP, often different countries or masterings. Most of the time I do this purposely, to find a better sounding copy, though I seem to have a habit of buying records I already own sometimes. In many cases, i haven't gotten rid of the multiples, but have selected the preferred copies, and back-shelved the others. 
Once I mistakenly bought an LP I didn't recall I already had- I gave the extra LP to a buddy. 

@zavato   I did that with a jazz CD.  Good to know I'm not the only one who has done that!  Like you I gave the second to a friend.
I've bought a number of classic titles on CD/SACD so I can play them in the car (less than optimum LP environment) and so I can load them on my classic ipod.  It makes mowing, shoveling, snowplowing much more fun and protects my ears from the racket.
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