Anyone heard the difference between Cullen Crossover and his new Crossover II?

I'm considering upgrading the stock power for my PS Audio P15 regenerator. Already have a 10 gage dedicated circuit. The standard crossover PC seems like it would be fine for the amps, but wondering what I would gain by going to the Crossover II between the wall and regenerator. 

Also considering the Morrow MAP4 for the main input.