Pass Labs X1 or Krell Phantom II

Hello Guys,

I'm waiting for a Krell Evo 402e bought on the web classified from Spain .. it's on the way.
Now I own a Pass Labs X1 preamp and since I have reed Cast cables work very well between Krell units I found a Krell Phantom II preamp with 3 meter Nordost cast cable on another web classified... unfortunately black and not silver like the 402e.
Btw .. what do you think about a change .. does someone thinks it should be an upgrade? .. a step ahead? .. or the extra money wont' be a valid deal? 

Thanks in advance for your opinions and support

Ps: I searched and than bought the Krell Evo 402e to drive my loved Thiel CS 2.4