both are great boats
My friend and dock mate has a C400 with whom we often buddy boat to various places as well as sail on each other's boat so the comparisons are pretty easy for us to make. He likes his better and I feel the same about mine for the following reasons:C400bigger cockpittwo wheelsheavier boat by 4000 lbsbigger V berthseparate shower stall in aft headH40.5faster (not even close)separate refrigerator and freezerlarger aft head (I find his stall shower really small)rotating salon table (easier to move, raise or lower)more storageeasier controlled travellerHaving buddy boated together in poor weather and 8 ft seas off Block Island last year, I think we would agree both boats can take a pounding pretty well and neither outshines the other. Having drilled numerous hull and bulkhead holes in both, they are equally well glassed and built to the same price point so I don't think you'd find any sig. construction differences. We both have some things we dislike about our boats as do our wives but neither of us plans to switch (boats that is) anytime soon.In our case, it came down to interior aesthetics that made us go with the H.