Richard Gray 400MKII vs. 400Pro, any differences?


I plan to add a Richard Gray's Power Company to my system and found out that the Richard Gray just released a new 400 Pro. When I asked my dealer, he told me that the new 400Pro cost about $200 more. Is it reasonable to get it instead of the 400 MKII? Does anyone know wether there is any difference between them? Thanks
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