I have both the Dynavector DV20XH and a Shelter 501 11. The Shelter is clearly better and I note some of the same improvements as noted in the original poster of the ZYX over the Dyna.
Having said that the Dynavector is an excellent cartridge for the price new and used; I thought it compared well with the Denon Dl103R (the other MC I have). The Denon was a bit more rounded/softer in the highs compared to the accurate Dynavector.
Having said that the Dynavector is an excellent cartridge for the price new and used; I thought it compared well with the Denon Dl103R (the other MC I have). The Denon was a bit more rounded/softer in the highs compared to the accurate Dynavector.