I have owned Roxanne custom, JH16 non FP, and noble k10.
For me, JH just steered to a different sound signature. I found the Roxanne very muddy, even with my super bright combo ZX1 + apex glacier. Roxanne is lack of engaging feeling and not lively as JH16. Compare to JH16, I would say Roxanne is a let down.
Roxanne vs K10, Roxanne just 1 level below in term of clarity and brightness.