FYI... The Suisin Inox Honyaki set the bar for laser stainless gyuto's and it's within your $400 budget. However I haven't seen it recommended very much in the past few years; there are simply much better values out there (Konosuke, Gesshin Ginga, even some customs).
Sorry I can't help with HHH vs. Rodrigue. They wouldn't be forum vendors here if they didn't deserve it.