I had the pleasure of meeting Peter in NY earlier this year and auditioning both the SG and the Hyperion at his facility. His setup included top line VPI, two tonearms so I could quickly switch between the two carts, his preamp/amp and his monitors. (Incidentally, I was absolutely amazed by the sound of his monitors especially the bass response considering that they don't have a large woofer like a floor stranding .) I brought my own vinyl which I have listened to extensively on my system (AMG with turbo arm, Ortofon cadenza black, Rogue Audio ares magnum phono and Rogue Audio RP7 preamp and Stereo 100 amp, vahallia 2 cabling and Sonus Faber Amati tradition speakers.)
Both carts were excellent, but the SG was truly exceptional in its speed, articulation, tonal accuracy, sound stage, presentation, etc. I listened to classical and jazz only so I cannot comment on voices, but even difficult to reproduce instruments such as organ were near perfect. I listened for nearly 4 hours and stopped only because I had a 7 hour drive ahead.
I took extensive notes for both carts which I can share if you like. I could not find any faults with the SG (SG-6 stylis).
Peter is brilliant and so willing to teach and truly friendly.
I am placing my order for the SG in June.