Pass Labs Xp- 30 versus x0.2

I'm thinking of upgrading from a Pass Lab x0.2 to a xp-30. Has anyone done a head to head comparison?
It will be a big difference. I owned the XP-20. This was a lot better than the X0.2. XP-30 will be even superior. Which amps you use?
X600.5 are on my list for this year!