Whether a certain cartridge with a certain load in a certain audio chain under certain conditions does sound wonderful or not to certain ears does not tell too much.
As cartridges too do suffer from the lack of real standardization of its electrical or mechanical parameters, we have to fine-tune each and any cartridge to meet its best performance in relation to its surrounding components and their very specific electrical/mechanical parameters.
This is true for MM, MI, MC and foremost LOMC.
Each is different - hey, - thats why we love analog don't we ?