I can't comment on HC-100 and Neopan 400. I was fond of that film in 120, and always liked using XTOL or D-76 as the developer for it. Now, I'm not saying there's anything wrong with HC-110, and considering that you've already exposed the film at EI 200, there should be plenty of shadow detail available even if the HC-110 doesn't provide as much speed as would XTOL. I am suspect of the MDC's data though. Much of it is taken straight from the manufacturer's tech sheets, and that's fine. Unfortunately though, a good portion of the data are anecdotal observations with no known provenance which may or may not represent good starting points for your application. Fuji doesn't list a a recommended time for Neopan 400 in HC-110 dilution H, so the data for that film must be, in the absence of any other supporting data, considered anecdotal.