I heard the Naia at an open evening at a local dealer where a Rega employee was doing a bit of a roadshow around some dealers and showcasing the new deck. It was a full Rega system in terms of cartridge, phono stage and amp, but with some nice Neat floorstanding speakers.
I haven't heard a P10 before. Most of my Rega deck experience has been various Planer Three's over the years and using the RB250/300 arms on various decks.
Given the price, the fanfair around it's arrival and the resulting expectation, I was quite underwhelmed by the sound tbh. It was decent enough, with a fairly broad, stable soundstage, even representation across the frequency range and a neutral overall presentation. It was even handed with the variety of music played, however I felt it lacked rythmic ability, and certainly no 'boogie' factor. It was a little boring in fact...
I know Neat's are very capable, having heard them with different amps/systems, so I wondered if the all-Rega remainder of the system was the culprit, and perhaps some more variety of amplification and or cart / phono stage is needed.
Also, weirdly it seemed to get slightly better over the hour I listened to it for, despite the fact it had been played for several hours before that... I wondered if this was a very new cartridge or simply everything needed several hours to start to come good?..
So, a bit of a disappointment really.