Twl, the first group of MoFis were mastered by the great Doug Sax and sound fantastic but there fairly few of them. Gary Giorgi supervised the later issues and it was rumored that he had hearing impairment, true of not, the highs were boosted on subsequent recordings. I really think most of them sound horrible, with very peaky treble and, in some cases, such as Aja, boosted bass as well. They were clearly playing around with frequency response. The DSOTM recordings are particularly murky and strident at the same time. A good British pressing on Harvest just kills them and the rare Japanese Pro Use LP on super heavy vinyl is roughly equal, but with a different set of strengths and weaknesses.