Your ears may be tricking you, or it may be a transcode or just a crappy rip. If you really want this sorted, first download ABX software for your computer and see if you can really tell the difference, decide blindly which file is better, and if the 128 is better you can either delete both or delete the 320 and just don't play it out.
But if you have the vinyl, just re-rip it.
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