The Lampi Nagra was a direct comparison. There is nothing to say a Kassandra is better than Lampi except hypotheses. The only data we have now is that bMichels prefers Nagra to kassandra - was that a comparison in the same system?
When a comparison is made, we shall see. regarding comparison to TT, even Lampi can be preferred to a TT which is not optimized. When a TT does get optimized, things change. Sometimes, analog doesn't sound good enough, but by changing the phono or some other component or set up element, we can get it sounding good. The variations in analog are just too high to make a generalization.
There are a lot of people who prefer Lampi to their own analog set up. For example, this thread about being satisfied with digital as compared to vinyl was started by a guy who bought the Lampi.
http://www.whatsbestforum.com/showthread.php?22227-Attitude-towards-and-costs-of-the-hobby He has a very high end analog set up - kuzma xl4, kuzma 4p . Ypsilon phono and SUT, Lyra atlas, VDH colibri and shelter harmony carts. Today he prefers to listen via his Lampi (older generation, not with new spec). Does this mean analog cannot be set up to outperform much more? No. It can, and some vinyl quality is just too real for digital to come close to. But yes, it does come close, the Lampi Nagra system had an SME 30/12 for compare too.
If someone does say their dac is better than analog outright, I would rather ignore his comments, and suggest he finds a new analog rig. But does it come close, sure. You can be satisfied in Mike Lavigne's system with the Lampi. While listening to it it is close, especially to Ortofon Anna.Yet when the vinyl stats playing, it is different, and the distance increases with the Goldfinger statement or with a 45 rpm vinyl