My bad, anyway a very good cruiser for its time but a much older design from Van de Stadt that started do be produced in 1988. Essentially a typical boat from the early 90's and curiously the type of boats that most on this forum associates with a good bluewater boat:
You are right that is an IOR boat with those small transoms and small cockpits, even if this is one that is moderate in what regards extreme IOR examples.
Here we have the Dehler 39 is a Judel/Vrolijk design from 1996 and that had a long life being only substituted by the current 41.
The boats are quite different in hull design being the 39 a much more beamier boat (3.82m to 3.30m) with the beam pulled much more aft, with a much bigger transom. A faster and better boat, in fact one that I like.
I was a bit surprised that Eric described the 39 as " quite a roller". Certainly the Pogo 12.50 will roll downwind less than a Dehler 39 but the Dehler 39 will roll much less than the 39 CWS.
Anders, please give your contribute to this discussion. Having owned a Dehler, a 43cr ( 1995), also a boat also from Vand de Stadt but with a more modern hull than the 39CWS (also a relatively narrow boat for a 43ft) and having now an Opium 39, a boat with a big beam and big stern, a fast cruiser with the hull also directly derived from solo racers, tell us about the difference in what regards sailing downwind and particularly in following seas.