I did upgrade from ART9. I was not after a $5k cartridge to replace the ART9. I explored reasonably priced cartridges. The only ones I found I really liked after the ART9 are EMT TSD-75/HSD-006, Anamighty Sound Denon 103 Level 3 and Decca Jubilee (more expensive than my planned budget). I currently use EMT HSD-006. Natural, neutral and dynamic. Very happy!
I know you would want to know the difference bettween ART9 and EMT. EMT is more effortless and flatter frequency response. It plumbs deeper into lows and the midrange is classic vinyl like, full and clear. ART9 sounded smaller and thinner than EMT. It has a more modern sounding midrange (a bit more CD like than EMT). Another area the EMT is remarkable is "quietness". The background is very quiet with EMT playing. Probably that gives the additional headroom to the sound.
I know you would want to know the difference bettween ART9 and EMT. EMT is more effortless and flatter frequency response. It plumbs deeper into lows and the midrange is classic vinyl like, full and clear. ART9 sounded smaller and thinner than EMT. It has a more modern sounding midrange (a bit more CD like than EMT). Another area the EMT is remarkable is "quietness". The background is very quiet with EMT playing. Probably that gives the additional headroom to the sound.