A shot in the dark: I have both arms mounted to my lab table. I have NEVER listened to my lab table nor either of these arms as I only use the rig for cartridge analysis. If you live close enough to Sonoma County, CA feel free to come by for an evaluation shoot out between the arms. I might even have two of the same cartridges to mount to each so as to make the change between them a quick one. You can be my excuse to make it the first time I've heard either arm in play!
(I use the 4Point as my main arm and love it)