slipping posted:here is a great read for those who find learning what makes what:
Vinyl Records
I was about to do the same thing.
Variables in your listening experience include (but are not limited to) the frequency range of the speakers/headphones you use, types of amplification and of course the medium you hear it on i.e. vynil/mp3/cd/etc.
Vynil will always have that 'full bodied' low and low mid warmth that, well, just sounds great!
Wav format (16 bit 44.1kHz) can be found on your CD copies. And this 'redbook' format is still probably the best format to date for representing audio.
Mp3's however, actually have 'irrelevant' frequencies removed from them and are deemed by most who work in the music industry as an inferior format (that just happened to gain ridiculous popularity via Napster - iPods).
That's it in a nutshell really. I'd elaborate but it's quite late now.