I've not heard the 10, only the 8.
It was easily amongst the best turntables I have heard.
By that I mean to say that if someone had told me that I was listening to a reel to reel tape deck I would not have been surprised.
Virtually no surface noise, stable image, rock solid timing, and a feeling of assurance rare in turntable replay.
Perhaps, and it's only perhaps, there could have been even more bandwidth and a deeper bass.
The only other area I've heard anything significantly better was in image size and depth, but that system featured entirely different amps, speakers and room, so who knows?
Anyway, it completely transformed my opinions of the Rega P8.
Perhaps, sometimes less is more?