IMHO, ultraeminent is more refined than the PC1 or the PC1 supreme. The difference betw the two versions are not that significant in my system (my listed system is not current). The airtights are slower and richer sounding. Tons of dynamics in the bass but a little overblown. Ultraeminent BC is faster and more neutral than the airtight line and avoid most of these problems. I suspect both airtights are related to the hypereminent ( one step down from ultra).
Ultraeminent conveys lots of detail but very low output demands a quality phono. Otherwise bass dynamics does not come thru. Transient response still a hair behind than Titan i & XV1T. The ultraeminent plays very well on the technics SP10 which complemented the transient character. This cart is more sensitive to floor bound acoustic feedback than the others mentioned. While a minus K isolation platform improves the playback of most carts, the ultra benefited the most. May be the suspension hangs on to the externally transmitted resonance longer. Not so much a weakness of the cart but the weakness of my floor.
Of all these, the one I enjoy and use the most is the Titan i, capable of the most tonal and dynamic contrast. Keeps getting better and better as I learn more about setup and tonearm matching. Outstanding build quality with stylus lined up near perfect and 34-35db channel separation. Phono friendly 0.5mV output. Exposed stylus easy to align. The titan i requires an arm that can channel away resonance but without blunting or softening the transient response. Best yet on the Dynavector 507mk2, this massive arm served the titan better than Davinci, Graham and triplanar. Xv1T is not so critical of this element.
