Well since no one else has said anything, I'll give you my very limited knowledge... I was aboard a Dean 365 just the once and only at a boat show
in the UK. There was a Prout at the same show, Snowgoose I think, and I can safely say that the Dean was nothing like the Prout. Hull
shape and cabin
top both totally different. My only lasting impression of the Dean was that the steps down from salon
to hull felt weird. You went down over a curve in the hull which left you feeling - rightly or wrongly - that the stairway was curved and I don't think there was much in the way of handholds while going up or down. The next Prout I was aboard would have been the 38 (later the Broadblue
385) and I don't remember that being similar to the Dean either.
Sorry, probably not much help, but the best I can do!