The OMR version of "Permanent Waves" is nice. Really nice. I am listening with my DT880, and my ears did not get fatigued. I tried the remastered version, got the volume to where they were about the same with my SPL meter, and tried to listen. It wasn't bad, but things sounded a little more congested than on the OMR version. I also noted that the decay of the cymbals, although not bad, ended more abruptly than on the OMR version. With the OMR version, cymbal clashes just seemed to fade away nicely.
I am no audiophile. I have no idea what to look for, but I definitely heard a difference. I had to listen closely to pick out the cymbal clash phenomenon mentioned above. The congestion thing may be my imagination, and once I heard it that way, I could play the songs from each album and still sense it. That's probably because I knew which was which, and my mind was subconsciously leading me to that sensation/conclusion.
Honestly, the biggest difference I notice is what I feel in my ear. I don't just hear the sound - I feel it. My inner ear tickles as the guitars go from high to low and vice versa. Cymbal clashes give me a slight chill. I kid you not. With the remastered version, I don't get much of that "feeling." Rather, I notice that I need to turn things down a bit or rest my ears after 2 or 3 songs because of the loudness. I'm not good enough to tell WHAT part of the music is louder. It just is - my uncomfortable ears tell me so.
I need to A/B this stuff in foobar, but I forgot how to do so! Anyway, too busy enjoying the music...
edit: [dunno if it is worth 2x as much as regular cd, but it sounds like a superior product...]