The gram rating is just the volume/weight of PVC in a particular pressing. I have super light pressings that sound great. Theoretically, the heavier record, having greater mass will self damp resonances produced as the stylus navigates the grooves. SQ has more to do with using original tapes by a great mastering engineer through high quality electronically and a great vinyl formulation with quality pressing machines and knowledgeable technicians to run them.
