i've got a 45 rpm original pressing of Deacon Blues SPDJ-33 that sounds absolutely incredible. my ABC copies of Steely Dan albums also sound better than reissues including MOFI's
a copy is never as good as an original, so the further out on the chain you get in copies likely the more info lost...i suspect that the digital versions total miss what the Dan are about.
"hi rez" that started this thread is really just a marketing game designed to take your money and watch you chase your tail.
enjoy the music