I have been cleaning up my iPod Beatles sections after getting the usb Beatle set (Git one!) and the mono box set (mine was counterfit but sounded fine.) I also have home ripped mp3s from cd quality or better rips of the Japanese and British pressings. I have been listening to the various overlapping copies and trying to keep only the best stereo and mono versions.
I use the word versions because sometimes, that is what I have, different mixes of the same song! Some of this I knew. There are some interesting variations of the German pressing of Magical Mystery Tour.
But I was unprepared for the variation of the usb set's mp3s. Some are great, as good as, but differing from my vinyl rips. Others are practically indestinguishable from the vinyl. Then there are a few that are lacking in bass and do not sound like the tunes I remember.
This does not apply to the 24 bit flac files which are great in my experience, only to some of the mp3s. Anybody else notice this or have a different experience?