I have owned this low output (.2mc) cart for about 5 months. Previously I had a Benz Ruby, about 5k. at the time of purchase, so in the same league.
Where to begin; the difference is night and day. The Benz has a glorious lushness to it; a rich musicality that, on classical particularly, gives a wonderful glow to the instruments. It is neutral but manages to be soft without undue warmth.
The Proteus is different in that it recreates the event in a characterless but absolutely penetrating way. The musical spectrum sounds real. You can hear that x is playing a flute and there is the bass line in every aspect, and oops, the singer has come in a bit late. Its all there.
With so few windings the cart is lightning quick and I suppose that is what allows it to capture every picosecond of time. It is "real" in an astonishingly lifelike way.
Also present is, by definition, the emotive quality of the music. This device allowed me, perhaps for the first time since I sold my old Sumiko Blue Point to really be moved by what I heard.
The sound is simply "there there". I don't know how to describe it better. For example, I have some yellow parlophones - With the Beatles, Help, etc. that I never listened to because they were kind of boring. Muddy , somewhat low fi; collectible though because they are rare and in great shape.
I put on "With" under the Proteus and, really, for the very first time, was blown away!! John's voice and intonation with the amazing harmony was astonishing. The raw power that popped out of the speakers made me realize - again for the first time since I heard "Help" on my parents breakfast table' Grundig in '65 just why the Beatles were the Beatles.
Realism, detail, musicality, and emotion don't get better than this. It is the top of the pile in my book. Your journey to the ultimate audio experience could very well end here.