Interesting post getting brought back to life. In my YC, there are two C42mkII's. Last weekend a C400 showed up at the marina we were at, parked next to one of the C42's. WHile I have not been in either. the 400 looked beefier if you will. IE more OPEN ocean style or what I would want as such. Altho it could have been that it has a taller freeboard, wider as mentioned etc, so it looked beefier. Probably built on par frankly.
Wife drooled over the 400 from the dock, and has drooled in one of the two C42's inside and out!:R:R:R A bit too slow of design for my tastes. That is not what spouse looks at!LOL
With that, take my typed nonsense or equal and I would bet as mentioned, BOTH boats are good boats.
She drives me boat,
I drives me dinghy!